User talk:Er.dinesh24

Hardware The hardware are the parts of the computer itself including the Central Processing Unit (CPU) and related microchips and micro-circuitry, keyboards,monitors, case and drives (hard, CD, DVD, floppy, optical, tape, etc...). Other extra parts called peripheral components or devices include mouse, printers,modems, scanners, digital cameras and cards (sound, colour, video) etc... Together they are often referred to as a personal computer. Central Processing Unit - Though the term relates to a specific chip or the processor a CPU's performance is determined by the rest of the computer's circuitry and chips. Currently the Pentium chip or processor, made by Intel, is the most common CPU though there are many other companies that produce processors for personal computers. Examples are the CPU made by Motorola and AMD. With faster processors the clock speed becomes more important. Compared to some of the first computers which operated at below 30 megahertz (MHz) the Pentium chips began at 75 MHz in the late 1990's. Speeds now exceed 3000+ MHz or 3 gigahertz (GHz) and different chip manufacturers use different measuring standards (check your local computer store for the latest speed). It depends on the circuit board that the chip is housed in, or the motherboard, as to whether you are able to upgrade to a faster chip. The motherboard contains the circuitry and connections that allow the various components to communicate with each other. Though there were many computers using many different processors previous to this I call the 80286 processor the advent of home computers as these were the processors that made computers available for the average person. Using a processor before the 286 involved learning a proprietary system and software. Most new software is being developed for the newest and fastest processors so it can be difficult to use an older computer system. Keyboard                                                                                         The keyboard is used to type information into the computer or input information. There are many different keyboard layouts and sizes with the most common for Latin based languages being the QWERTY layout (named for the first 6 keys). The standard keyboard has 101 keys. Notebooks have embedded keys accessible by special keys or by pressing key combinations (CTRL or Command and P for example). Ergonomically designed keyboards are designed to make typing easier. Hand held devices have various and different keyboard configurations and touch screens. Some of the keys have a special use. They are referred to as command keys. The 3 most common are the Control (CTRL), Alternate (Alt) and the Shift keys though there can be more (the Windows key for example or the Command key). Each key on a standard keyboard has one or two characters. Press the key to get the lower character and hold Shift to get the upper. Removable Storage and/or Disk Drives - All disks need a drive to get information off - or read - and put information on the disk - or write. Each drive is designed for a specific type of disk whether it is a CD, DVD, hard disk or floppy. Often the term 'disk' and 'drive' are used to describe the same thing but it helps to understand that the disk is the storage device which contains computer files - or software - and the drive is the mechanism that runs the disk. Digital flash drives work slightly differently as they use memory cards to store information so there are no moving parts. Digital cameras also use Flash memory cards to store information, in this case photographs. Hand held devices use digital drives and many also use removable or built in memory cards. Mouse - Most modern computers today are run using a mouse controlled pointer. Generally if the mouse has two buttons the left one is used to select objects and text and the right one is used to access menus. If the mouse has one button (Mac for instance) it controls all the activity and a mouse with a third button can be used by specific software programs. One type of mouse has a round ball under the bottom of the mouse that rolls and turns two wheels which control the direction of the pointer on the screen. Another type of mouse uses an optical system to track the movement of the mouse. Laptop computers use touch pads, buttons and other devices to control the pointer. Hand held’s use a combination of devices to control the pointer, including touch screens. Note: It is important to clean the mouse periodically, particularly if it becomes sluggish. A ball type mouse has a small circular panel that can be opened, allowing you to remove the ball. Lint can be removed carefully with a tooth pick or tweezers and the ball can be washed with mild detergent. A build up will accumulate on the small wheels in the mouse. Use a small instrument or finger nail to scrape it off taking care not to scratch the wheels. Track balls can be cleaned much like a mouse and touch-pad can be wiped with a clean, damp cloth. An optical mouse can accumulate material from the surface that it is in contact with which can be removed with a finger nail or small instrument. Monitors - The monitor shows information on the screen when you type. This is called outputting information. When the computer needs more information it will display a message on the screen, usually through a dialog box. Monitors come in many types and sizes. The resolution of the monitor determines the sharpness of the screen. The resolution can be adjusted to control the screen's display.. Most desktop computers use a monitor with a cathode tube or liquid crystal display. Most notebooks use a liquid crystal display monitor. To get the full benefit of today's software with full colour graphics and animation, computers need a color monitor with a display or graphics card. Printers - The printer takes the information on your screen and transfers it to paper or a hard copy. There are many different types of printers with various levels of quality. The three basic types of printer are; dot matrix, inkjet, andlaser. •	Dot matrix printers work like a typewriter transferring ink from a ribbon to paper with a series or 'matrix' of tiny pins. •	Ink jet printers work like dot matrix printers but fires a stream of ink from a cartridge directly onto the paper. •	Laser printers use the same technology as a photocopier using heat to transfer toner onto paper. Modem - A modem is used to translate information transferred through telephone lines, cable, satellite or line-of-sight wireless. The term stands for modulate and demodulate which changes the signal fromdigital, which computers use, to analog, which telephones use and then back again. Digital modems transfer digital information directly without changing to analog. Modems are measured by the speed that the information is transferred. The measuring tool is called the baud rate. Originally modems worked at speeds below 2400 baud but today analog speeds of 56,000 are standard. Cable, wireless or digital subscriber lines can transfer information much faster with rates of 300,000 baud and up. Modems also use Error Correction which corrects for transmission errors by constantly checking whether the information was received properly or not and Compression which allows for faster data transfer rates. Information is transferred in packets. Each packet is checked for errors and is re-sent if there is an error. Anyone who has used the Internet has noticed that at times the information travels at different speeds. Depending on the amount of information that is being transferred, the information will arrive at its destination at different times. The amount of information that can travel through a line is limited. This limit is called bandwidth. There are many more variables involved in communication technology using computers, much of which is covered in the section on the Internet. Scanners- Scanners allow you to transfer pictures and photographs to your computer. A scanner 'scans' the image from the top to the bottom, one line at a time and transfers it to the computer as a series of bits or a bitmap. You can then take that image and use it in a paint program, send it out as a fax or print it. With optional Optical Character Recognition (OCR) software you can convert printed documents such as newspaper articles to text that can be used in your word processor. Most scanners use TWAIN software that makes the scanner accessible by other software applications. Digital cameras allow you to take digital photographs. The images are stored on a memory chip or disk that can be transferred to your computer. Some cameras can also capture sound and video. Case - The case houses the microchips and circuitry that run the computer. Desktop models usually sit under the monitor and tower models beside. They come in many sizes, including desktop, mini, midi, and full tower. There is usually room inside to expand or add components at a later time. By removing the cover off the case you may find plate covered empty slots that allow you to add cards. There are various types of slots including IDE, ASI, USB, PCI and Fire wire slots. Depending on the type notebook computers may have room to expand. Most Notebooks also have connections or ports that allow expansion or connection to exterior, peripheral devices such as monitor, portable hard-drives or other devices. Cards - Cards are components added to computers to increase their capability. When adding a peripheral device makes sure that your computer has a slot of the type needed by the device. Sound cards allow computers to produce sound like music and voice. The older sound cards were 8 bit then 16 bit then 32 bit. Though the human ear can't distinguish the fine difference between sounds produced by the more powerful sound card they allow for more complex music and music production. Colour cards allow computers to produce colour (with a colour monitor of course). The first colour cards were 2 bit which produced 4 colors [CGA]. It was amazing what could be done with those 4 colors. Next came 4 bit allowing for 16 [EGA and VGA] colors. Then came 16 bit allowing for 1064 colors and then 24 bit which allows for almost 17 million colors and now 32 bit and higher allow monitors to display almost a billion separate colors. Video cards allow computers to display video and animation. Some video cards allow computers to display television as well as capture frames from video. A video card with a digital video camera allows computers users to produce live video. A high speed connection is required for effective video transmission. Network cards allow computers to connect together to communicate with each other. Network cards have connections for cable, thin wire or wireless networks. For more information see the section on Networks. Cables connect internal components to the Motherboard, which is a board with series of electronic path ways and connections allowing the CPU to communicate with the other components of the computer. Memory - Memory can be very confusing but is usually one of the easiest pieces of hardware to add to your computer. It is common to confuse chip memory with disk. An example of the difference between memory and storage would be the difference between a table where the actual work is done (memory) and a filing cabinet where the finished product is stored (disk). To add a bit more confusion, the computer's hard disk can be used as temporary memory when the program needs more than the chips can provide. Random Access Memory or RAM is the memory that the computer uses to temporarily store the information as it is being processed. The more information being processed the more RAM the computer needs. One of the first home computers used 64 kilobytes of RAM memory (Commodore 64). Today's modern computers need a minimum of 64 Mb (recommended 128 Mb or more) to run Windows or OS 10 with modern software. RAM memory chips come in many different sizes and speeds and can usually be expanded. Older computers came with 512 Kb of memory which could be expanded to a maximum of 640 Kb. In most modern computers the memory can be expanded by adding or replacing the memory chips depending on the processor you have and the type of memory your computer uses. Memory chips range in size from 1 Mb to 4 Gb. As computer technology changes the type of memory changes as well making old memory chips obsolete. Check your computer manual to find out what kind of memory your computer uses before purchasing new memory chips.

Software The software is the information that the computer uses to get the job done. Software needs to be accessed before it can be used. There are many terms used for process of accessing software including running, executing, starting up,opening, and others. Computer programs allow users to complete tasks. A program can also be referred to as an application and the two words are used interchangeably. Examples of software programs or applications would be the Operating System(DOS, Windows, UNIX, MacOS and various others), Wordprocessor (typing letters),Spreadsheet (financial info), Database (inventory control and address book),Graphics program, Internet Browser, Email and many others. As well any document that you create, graphic you design, sound you compose, file you make, letter you write, email you send or anything that you create on your computer is referred to as software. All software is stored in files. Software is stored on a disk, card, tape or one of the dozens of otherstorage devices available. There are millions of different pieces of software available for almost every conceivable need. Software is available commercially through stores and mail order and also available on the Internet. Software is also available through an Open Source license which allows anyone to use the Open Source software free of charge as long as the license is maintained. If you can't find the application that you need software development companies can custom design software for you. The largest software companies offer packages of software or suites that include many of the programs that the average person or business needs. Software packages or suites contain programs that work together and share information, making it easier to combine that information in versatile ways. For example when writing a letter you can get the mailing address from an address book, include a letterhead from a graphics program and included a financial chart from a spreadsheet and combine this collection of information in the body of the letter. The three basic types of software are; commercial, shareware and open source software. Some software is also released into the public domain without a license. Commercial software comes prepackaged and is available from software stores and through the Internet. Shareware is software developed by individual and small companies that cannot afford to market their software world wide or by a company that wants to release a demonstration version of their commercial product. You will have an evaluation period in which you can decide whether to purchase the product or not. Shareware software often is disabled in some way and has a notice attached to explain the legal requirements for using the product. Open Source software is created by generous programmers and released into the public domain for public use. There is usually a copyright notice that must remain with the software product. Open Source software is not public domain in that the company or individual that develops the software retains ownership of the program but the software can be used freely. Many popular Open Source applications are being developed and upgraded regularly by individuals and companies that believe in the Open Source concept. Operating Systems -All computers need some sort of Operating System (OS). The majority of modern home computers use some form of Microsoft's operating systems. The original Microsoft operating system was called DOS (Disk Operating System) though most computers use Windows. Windows comes in various versions beginning with version 3.x then 95, 98, ME, XP, Vista and currently version 7. A few computers use IBM's O/S2. Apple's Mac use their own operating system beginning with OS 1 though to OS 10.x. In the past large companies and institutions would have an operating system design exclusively for them but as the commercial operating systems become more sophisticated the benefits of this practice is becoming less apparent. Some computer professionals, Internet Service Providers (ISP) and mainframecomputer users use an operating system such as UNIX (or a variant such as Linux), Windows NT or 2000 (Win2k) or one of the other network or server based operating systems. There are many smaller operating systems out there. The problem is that software is currently being developed only for the main operating systems and only the newest versions of these OS. Many older computers with unique operating systems have lots of software already developed for them but there is very little new software being developed for the older computers. The older operating systems are less likely to offer technical support than the more modern operating systems. The operating system controls the input and output or directs the flow of information to and from the CPU. Much of this is done automatically by the system but it is possible to modify and control your system if you need to. When you turn your computer on it first needs to load the operating system sometimes referred to a booting up. Basically the computer starts from scratch every time you turn the power on. It checks all its components and will usually display a message if there is a problem. Loading the system is usually automatic. Once the system is loaded the user can start the application or program that they are going to use. Most computer users will run Microsoft Windows, Mac OS or Linux as their operating system. These OS are Graphic User Interface (GUI) which allows the user to control or run the computer using a Mouse and Icons. The user simply moves the mouse on a flat surface, rolls the trackball, or moves their hand over the touchpad to control a pointer. They then choose the option they want by pressing a button or touching the pad. Without a GUI the user controls the computer using the keys on the keyboard. This is referred to as a Command Line Interface (CLI) Disk and Storage Disks and cards are used to store information. All information on computers is stored in files. The size of a file is measured in bytes. A byte is approximately one character (letter 'a', number '1', symbol '?' etc....). A byte is made up of 8 bits. A bit is simply an on or an off signal which passes through the computers circuitry. Every piece of software can be broken down into a series of on or off signals or it's Binary Code. •	About a thousand bytes is a kilobyte (Kb). •	About a million bytes is a megabyte (Mb). •	About a billion bytes is a gigabyte (Gb). •	About a trillion bytes is a terabyte (Tb) Disk are a common way of transporting information such as bringing files home from work or sharing files. Floppy disks have become less useful as file sizes increase and Compact disks (CDs), Flash drives and Digital Video Devices (DVDs) are becoming more popular. Most software is sold on a CD. Internal Hard disks are the most common storage device. Compact disks or CDs can store large amounts of information. One disk will store 650 Mb. One type is a CD-ROM which stand for Compact Disk Read Only Memory. Another type is a CD-RW which stands for Compact Disk - Read/Write. CD drives can copy information or burn information on to a blank CD. Common Read Only CDblanks can only be written to once though more expensive Read/Write CD's can be used over and over again. DVD disks can store 4.5 Gb on standard disk, 8 Gb on a dual layer disk and 16 Gb on a blue-ray disk. Digital recorders allow you to store large files, such as movies, on a single disk. Hard disks store the majority of information on today's modern computer. Some of the first hard disk stored 10 to 40 Mb. Today the standard hard disk stores 150 Gb or more (this number is constantly increasing). Information can be stored and deleted as necessary. As files get larger the speed that hard disks can read and write become more important. Flash drive or thumb drives range in size. Floppy disk or diskette comes in two basic sizes; 5.25 inch and 3.5 inch. Both have a low and high density versions though 3.5 inch high density disks are the most common though many modern computers are being sold without floppy disk drives. Disk size	Amount of storage	Approximate printed 8.5 x 11 inch pages 3.5 high density	1.44 Mb	720 pages CD	650 Mb	a small library DVD	4.5 Gb	a feature length movie DVD dual layer	8 Gb	a long feature length movie with extras
 * Editor's Note: I say 'about' because everything in computers must be divisible by 8 so a kilobyte is actually 1,024 bytes. The reason for this goes beyond the scope of an introductory level document but as it can cause some confusion I thought it should be mentioned.

There are many other storage devices including tapes, Panasonic's LS120 3.5 inch diskettes, Iomega's Zip & Jazz disks, VCR tape and many others. Innovation in storage technology is advancing rapidly and some technologies become obsolete.. Information is stored in an electromagnetic form much like a cassette or video tape. Note: Keep disks away from strong electric or magnetic fields including x-rays. Be aware of high electromagnetic areas in the room such as televisions, speakers, high tension wires, etc... Use disks only at room temperature and keep them out of direct sunlight. If possible avoid passing electromagnetic storage devices through airport x-rays. In theory information stored on a disk will last indefinitely but the physical storage device will wear out with usage and time so be sure to back up(copy) your important files to a second storage device.

Basic Computer Operations :- How Computers Work Input: Information and programs are entered into the computer through Input devices such as the keyboard, disks, or through other computers via network connections or modems connected to the Internet. The input device also retrieves information off disks. Output: Output Devices displays information on the screen (monitor) or theprinter and sends information to other computers. They also display messages about what errors may have occurred and brings up message or dialog box asking for more information to be input. The output device also saves information on thedisk for future use. Processing: The CPU or central processing unit is sometimes called the Control Unit and directs the operation of the input and output devices. The Coprocessoror the Arithmetic-Logic Unit does arithmetic and comparisons. The memory orRAM temporarily stores information (files and programs) while you are using or working on them. The BIOS or basic input/output system controls the dialogue between the various devices. Keyboard Layout and Data Entry ENTER or RETURN - Moves the cursor down one line and to the left margin. Enter also process commands such as choosing an option in a dialog (message) boxes and submitting a form. DEL or DELETE - Deletes the character at cursor and/or characters to the right of the cursor and all highlighted (or selected) text. BKSP or BACKSPACE - Deletes the character to the left of cursor and all hightlighted text. SPACE BAR - Moves the cursor one space at a time to the right SHIFT KEY - Use the shift keys to type capital letters and to type the upper character on keys with two characters on them CAPS LOCK - Locks the keyboard so it types capital letters (a light goes on when caps lock is on) TAB - Moves the cursor five spaces to the right (number of spaces are usually adjustable). Tab moves to the next field in a form or table (Shift-Tab for previous field). ESC or ESCAPE - Cancels a menu or dialog box ARROW KEYS - Moves the cursor around document without changing text FUNCTION KEYS or F KEYS - Access commands by themselves or in combination with the three command keys; CTRL, SHIFT, and ALT Command or Special Keys Command keys normally do nothing on their own but work in combination with other keys. Each piece of software uses the command keys differently though there is a move to standardize some functions. The Control key or Ctrl is often used to access commands. The Alternative key or Alt is often used to access menus. The Shift key is used to type CAPITAL LETTERS. As well the command keys are all used to move through documents and edit text faster and easier. As well many computers have Special keys design specifically for the particular computer. Apple computers have the Apple keys and Macs have Command keys. Many keyboards now have a Windows key specifically for Windows 9x and newer systems. Many older computers also have special keys used for a variety of different functions. Some Notebook or Laptop keys are left out because of space limitations and they usually have a Special function key which allows other keys to double for the missing ones. Basic Typing Rules Place one space between each word, after a punctuation mark and at the end of a sentence. Always start a sentence with a capital letter. Use capitals for names, addresses, provinces and countries, places, organizations, businesses, associations, schools, colleges, universities, days of the week, months, holidays, nationalities, ethnic groups and languages. Learning the keyboard is the first step to learning computers. Learning involvespractice. It really is as simple as that. There are two kinds of typing. The first is called Touch Typing. The Touch Typist uses the Home Keys (asdf for the left hand and jkl; for the right) and all the fingers on both hands as well as the thumbs for the Space Bar while typing. There are many commercial and public domain programs that are designed to teach this method. The other method is some times called 'Hunt and Peck' or depending on finger strength 'Search and Destroy'. This involves using one or more fingers on one or two hands to type. It is a perfectly acceptable way of using a computer and many people get al

Keyboard Symbols The following chart displays the character symbols, name and Latin-1 number on a standard keyboard in their approximate position on the keyboard. Most characters from any Roman based language can be created on any computer using theAmerican Standard Code for Information Interchange or ASCII using a single byte. Most computers and software also recognized American National Standards Institute's (ANSI) formatting standards as well. View the entire ISO Latin -1 Character Set. ~ Tilde &#126: ! Exclamation Point &#33; @ At &#64; Number or Hash &#35; $ Dollar &#;36 % Percent &#37; ^ Caret &#;94 & Ampersand &#38; Asterisk &#42; ( Open or Left Parenthesis &#40; ) Close or Right Parenthesis &#41; _ Underscore or Horizontal Bar &#95; + Plus &#43;

` Acute &#96; - Dash or Hyphen &#45; = Equals &#61;

{ Open or Left Curly Brace &#;123 } Close or Right Curly Brace &#125; Or or Vertical Bar &#124;

[ Open or Left Square Bracket &#91; ] Close or Right Square Bracket &#93; \ Reverse Solidus or Backslash &#92;



Colon &#58; " Quote &#34;

Semi Colon &#59; ´ Apostrophe or Single Quote &#;39

< Less Than &#60; > Greater Than &#62; ? Question Mark &#63;, Comma &#44; . Dot, Period or Full Stop &#46; / Solidus or Forward Slash ong fine with this technique. Health and Safety Health and Safety is crucial to the effective operation of a computer. Stress is widely accepted as a common and possibly the most dangerous aspect of using a computer. It is possible to use a computer safely if a few simple rules are maintained. Musculoskelatal problems can occur when improper office equipment is used. Chairs should be adjustable so that legs are at a right angle. The back should have good support for the spine and lower back. The seat should swivel and be made from fabric that is porous. Eye strain can be caused by staring at a fix object for extended periods of time (like a computer). People who use glasses may have to get their prescriptions changed and people who use bifocals can find that the line interferes with the screen and trifocals triple the problem. Regular users of computers may develop focusing problems. Temporary colour distortion has also been reported. A safe working environment is crucial. Ventilation is an integral part of the new technological workplace. Though standards are set by the manufacturer of computer equipment the modern office has many different pieces of equipment. All electronic equipment emit some level of electromagnetic field which, on it's own, most likely isn't a concern but when combined with other equipment can create hazardous working environments. Pregnant women should take extra care when working around electromagnetic fields. Like any piece of equipment, computers should have scheduled maintenance. Stress is caused by many things including poor or inadequate training, monitoring, fear of new technology, lack of control over work, physical problems, hardware problems causing delays, poor layout of work space and the myriad of other problems that people experience that combine to create stressful situations. Time away from the computer during the work day is crucial! This gives the body a chance to stretch and gives the eyes a chance to rest. Breaks should be scheduled and followed with great discipline. Computers, even more so than television, have a mesmerizing effect on the user so that it is easy to work right through breaks without noticing. There are many other issues to be discussed around computer health and safety but it is important to understand that there are problems and solutions to those problems that the user, administrator and manager must address.

Using Software As stated earlier software is anything created and/or stored on a computer or computer storage device (like a disk). The work that is produced using an application or program is also software and is usually referred to as a file or a document. Files & Documents Once you have typed or created a new document or file on your computer, you will have to decide what to do with it. You could print it right away using a Printcommand and then Exit or Quit your program without saving it, but most of the time you will want to Save your document for future use. The computer saves its information on a disk, most often the hard disk, and the users determines where and when the file or document is saved. top Folders & Directories On the disk are directories or collection of folders. These directories or folders could be compared to a filing cabinet. All files are stored in a directory. Most hard disks have many directories or folders and files can be stored in any of them. Directories can have sub-directories and sub-sub-directories many levels down. The directory immediately below the current directory is called the child directory. The directory immediately above the current one is called the parent directory. The top of the directory structure is called the root directory. When a user adds or installs a new program on the computer the installation process will usually create a new directory or folder to store the application's files. Users can create and delete directories or folders as the need arises. Older operating systems require that the directory be emptied of files before it can be deleted. When removing a directory always check before deleting it to make sure that it doesn't contain files you need. You can easily move files from one folder or directory to another using menucommands, drag & drop using the mouse or a file utility. It is important to understand your computer's directory structure as a file can be misplaced if it is saved in the wrong directory. One of the main problems new users have is creating a filing system. Modern operating systems address the 'filing problem' by automatically creating a (My) Documents folder. By saving files or documents in this folder you will always know where to look for your files. Create sub-folders within this folder for your main projects. Examples could be a separate folder for your correspondence called Letters or a folder for images called Graphics or Pictures. The main Documents folder can also be renamed to what every name you want it to be called. If your operating system doesn't automatically create this folder simply create your own Documents folder to save your documents in. top Saving Files or Documents In order to save a new document or file you must first choose the Save command. Most modern software place this command in a menu which you access with themouse button or Alt key. Each file must be given a filename so it can be found easily the next time it is needed. Computers using DOS 6.X or older followed the 8.3 rule: a filename can only be 1 to 8 characters long followed by a 1 to 3 character extension separated by a dot. Three character extensions are common because of this. Modern operating systems allow computer users to use filenames up to 256 characters. Mac users, Windows 9X & NT/2000 and UNIX/LINUX (along with a few other) use long file names but names using over 32 characters get unwieldy. It is better to use a directory or folder to help describe them and keep common files together with shorter filenames. Many modern software programs (applications) add their own extension to filenames. These extensions allow operating systems to recognize certain filenames and associate (match) them to the program that created it. As well as choosing a filename, users must choose a directory and/or disk to store the file in. Make sure that you are consistent and use a logical structure. Once you are sure you know where the file is going to be stored press Enter on the keyboard or press the left mouse button over the word Save or Okay to store the documenton a disk, in the directory with the filename you have chosen. Some software programs will automatically save files in specific directory that is created when the program is installed (default settings). You can easily changed these settings permanently using the applications Preferences or temporarily at the point of saving the file. Some common rules are: •	All files are saved on a disk or storage device. •	A disk is usually broken up into directories and sometimes into partitions. •	A directory or folder is a way of keeping like files in a common area. A partitioned disk, though physically a single disk, is treated like separate disks and given a separate drive letter (and/or name). It is possible to save or move files anywhere that your computer can access. This includes disk (or other storage devices) on your computer, to any directory or sub-directory on your computer or on a network that your computer is connected to. Always make sure that you have chosen the correct directory and filename before pressing Enter or choosing Save. top Printing The promise of a paperless office has not happened though conservation is catching on and it is possible to reduce paper consumption by using your computer more effectively. Having said that many computers are attached to printers and there are many reasons to print out documents that you create on your computer. Most software programs and applications allow the user to print the information that is created in the program. When choosing a printer consider the peripheral equipment that you will need as well as the actual printer. Peripherals include paper, ribbons or ink cartridges,toner and occasionally print heads. You may have to adjust some of the settings for the printer to get the output you want. Density adjustments determine how much ink is placed on the paper or how many dots per inch (DPI). Draft quality will printer quicker but creates a fainter copy (less dense). Modern Software has a Preview option which show what the page will look like when it is printed. Portrait prints the document up and down.Landscape prints the document on it's side. Most software allows the user to adjust the margin width or the blank space at the top, bottom, left and right edge of the paper. top Exit or Quit It is important to Exit or Quit a program, application and the operating system before shutting off the computer. It is a good idea to Quit a program when you are finished with it as it takes up memory. Exiting a program should free up the memory that the program was using. Having a number of programs running simply uses up resources that may be needed in another project. Exiting properly also saves the program settings so that when you return to the application many changes that were made will still be active. top Menus Menus are the most common way of interacting or controlling your software. Though each program has it's own menu, modern software developers have begun establishing some standardization in how they create their menus. Many programs have a menu called File which controls things like Opening, Saving and Printingyour file and Exiting the program. Many also have an Edit menu which contains the main editing commands like Cut, Copy and Paste. The items on the menu are Commands or the features of the program. You choose the command that you want with the keyboard, mouse, trackball or touchpad. Commands control the operation of the software. Menu bars are usually positioned at the top of the screen and are accessed by moving the cursor to the menu and pressing the button (left button if there are two). This displays a pull down menu with a number of commands or features. Depending on how the program works either let go of the button and move to the command you want then press the button again to choose it or while holding down the button, move to the command and let go to choose it. Menus can also be controlled through the keyboard. The most common way of accessing the menu through the keyboard is by pressing the Alt key and using theArrow or Cursor Movement keys to move through the menu items, then pressingEnter to choose the item you want. Many menu items can also be accesses usingHot key combinations. One common keyboard combination is to first tap the Alt key and then press letter key for the command you want. Menus are created in a hierarchy. Some menu items branch out to give even more choices. Some menu items open Dialog Boxes that allow you to choose from a number of different options. Dialog boxes allow computer users to select different options. Some dialog boxes have 2 or more Tabswhich can be clicked to choose more options. Once the options have been chosen press Okay to apply the options. Some dialog boxes have an Apply button which will apply the options that you have chosen without closing the dialog box. Choose Cancel to close the dialog box without applying the changes selected. Note that options set with the Apply button cannot be canceled this way. Modern software places the most popular commands on a toolbar for easier access. Simply click the left mouse button over the menu item to access a particular command. These tool bars can usually be customized and often allow the user to move or Tear Off the menu and drag them to a preferred location or Dock on the screen. Menus can also be customized by adding or removing commands. Windows has a context sensitive menu that is activated with the right button. When the right mouse button is click over an object on the screen or area of the screen, a specific menu with commands related to that object will be displayed. Click the left mouse button on the command to choose it. top Installing New Software Most software sold today has an automated install sequence that is activated with the press of a button. The installation process will create a directory, if necessary, to store the files related to the new program, uncompress and copy the files to the directory and often adds itself the desktop (Start) menu. Many installation processes will also copy files to other parts of the computer and register itself with the operating system by updating the registry. Some programs will associate themselves to a certain filename extension. Older software many not have this option. The installation procedure is the same though. First create a folder or drawer to store the program and it's related files in. This makes it easy to find them and minimizes file clutter in the main directory. Copy the files from the installation disk to the folder that you will be running the program from. A lot of Software is compressed and you may need to uncompress it before you can use it. You then can create a new item, create a short cut to the program or add it to your desktop menu or utility program. top Backing up Files Computer errors and software failures happen ocasionally so it is important to backup your files and documents. One simple way to backup your files is to copy them to a disk. If there are only a few small files a floppy disk will work but if you are backing up lots of large files a cd/dvd burner, a second hard drive or tape backup may be needed. You can use a software program to automate backups or do it manually. A manual backup usually involves dragging the files or folders to the backup disk or tape to create the duplicate backup. Store your backup files in a safe place out of the sun and away from electro-magnetic devices such as speakers and wires with strong electrical currents. Every file that you create and plan to keep should be backed up. This includes word processing documents, financial information, databases, photos, etc... Some less obvious files that also need to be backed up are email, Internet Favorites or Bookmarks, and Address Books. Check the help files in your email program on how to back up email. Generally each folder name in your email program is a file containing the individual email messages and copying these files to the backup disk or tape will be sufficient. Software preferences such as customized menus and settings can also be backed up. Check your software's help files to find out where these files are located. A newer software version may be installed on the computer before ever needing the backups so make sure that the newer programs can handle the older file format. When to backup is an individual choice. A company should have a backup policy which explains how and when data should be backed up. It all depends on how important the information is and how difficult it would be to duplicate it in the event of a system failure. If the information is critical an automatic backup system that duplicates the documents immediately may be needed (a Redundant Arrays of Inexpensive Disks (RAID) system is an example). If the files are not critical a weekly backup may be all that is needed. It is impossible to determine when a system failure will occur so it is better be cautious. The backed up data can then be used as an archive, to recover from a system failure or to transfer data to a new computer system. Simply copy the files to the correct folder to restore them. Backup software will have an automatic recovery feature that will restore the backed up file automatically. top Compression and Decompression Most software you buy or get off the Internet is Compressed. Computers store information in bytes which are made up of on or off signals. The software applications that uses these files need to have all the on and off signals (bytes) in place but when the file is stored they can be modified to take up less space on the storage disk or tape. There are commercial and shareware programs that will compress and decompressed files for you. The most popular form of data compression is calledzip or stuffit but there are others available as well. Programs are also available to compress and decompress your files as you or the application you are using requires them. This can be a way of making more space available on a hard drive. Windows comes with a program that will compress part of your hard disk. Be sure to read the documentation before embarking on a project like compressing a hard drive.

The Desktop The Desktop offers many features that make using your computer easier. You can easily start programs or applications, copy and move files from one place to another and drag and drop files and program where you want them on the computer or even on to a program's icon to open a file. Open and Save menus are streamlined to allow all applications to have the same basic features plus program specific features. Operating systems are often backwardly compatible with older system so that older programs will run. Usually when new programs are created they are designed to work with the newest operating system to allow them to use all the newest features. Desktop Menu The Start Button or Apple menu starts programs, opens documents, and access most parts of the system. Windows Program and Apple Dock menus can be customized as needed. •	Program or Dock displays a list of the programs that are installed through Windows and available to use •	Documents displays a list of the last 15 documents used allowing the user to open them directly from this menu •	Settings displays system components, such as printers, control panel and taskbar •	Find/Search has search abilities to find files, folders and phrases in documents on your computer •	Help displays help topics broken up into contents, index and find components •	Run allows you to start a program from a command line •	Shut down shuts down the computer, restarts the computer or logs you off a network •	Favorites and Active Desktop is an option available to Windows 98+ (or Internet Explorer 4x) users Taskbar (Windows) or Dock (Apple) •	displays the program running and windows open o	to bring a program or window to the front single click on the item on the taskbar or dock o	right click in Windows and click hold in Apple to display a menu for the item •	right click an open area or click hold the seperator for a Taskbar or Dock menu •	the Window system tray on the right of the Taskbar displays indicators for certain tasks (for instance a printer icon will appear when the printer is engaged) •	click and drag the Taskbar to the top, bottom, left or right and choose Dock properties to place Dock on left, right or bottom •	drag the Taskbar to extend it and the Dock to make it bigger •	drag and icon to the Dock or Taskbar to add an alias or shortcut and drag the icon off to remove it •	the Dock and Taskbar can be hidden until needed •	use Start/Settings/Taskbar to customize the Start menu properties and choose Apple/Dock to change the Dock properties Control Panel & System Preferences •	used to change system settings like screen savers, time, screen colours •	also used to add and remove programs, fonts add and make changes to hardware and software settings Computer •	displays all the components of the computer including disk drives and networks •	all parts of the computer can be accessed through My Computer's hierarchical structure •	double click on any icon to view the contents of a disk, folder or run a program Windows & Finder All programs, folders, tasks and most other operations open in a window.

Windows are used to: •	share common attributes through out the entire system •	contain menus for File, Edit, View and Help which change depending on the task o	File 	open, rename, delete or change properties of files and folders 	Send To used to open files in a specified program 	create "Shortcuts" o	Edit 	move, copy and paste files and folders 	Undo the last change o	View 	change how files are displayed 	toggles Toolbar and Status bar (Microsoft) 	sorts files by choosing column name 	can be set system wide o	Help 	displays help topics for active application Toolbar •	displays icon menu of main options Status bar •	shows current status of the window (Microsoft) Shortcuts & Aliases •	can be created anywhere that is convenient to access a program, file or folder •	select item and choose Create Shortcut or Make Alias then drag or move it to where it is needed •	use the right mouse button to drag the item to the target and choose Create Shortcut Here from the menu that appears (Microsoft) •	when you delete a Shortcut or Alias the original application and its icon remain intact Favorites •	collection of short cuts to documents, programs and websites Programs & Features Some Features •	Long file names - document names can now use names up to 255 characters including spaces using any character except \ / : * ? " < > | •	Plug and Play - many hardware devices like CDs, tape drives, upgrade cards, etc... will automatically be detect and can be automatically install on the system •	32 bit Preemptive Multitasking - allows users to leave a task running while working on another •	Right Mouse button - used to display event specific or context sensitive menus (Microsoft) •	Drag and Drop feature allows files or other information to be dragged from one area and dropped in a new location or into an other application •	Active Windows - make your Desktop behave like a web site (Microsoft) •	Software Update - automates updating software through the Internet •	System Information or Profile - provides information about the computer system Using Help •	to get help about a specific procedure click the help button in the top right corner of the screen •	Contents list general topics grouped by subject •	Index list specific topics accessed by scroll bars or typing the topic •	Find creates an index of words in Help and allows searches by word or phrase •	click Help Topics to return to the Help menu •	Troubleshooters will step you through a series of steps to solve computer problems (Microsoft) Microsoft Explorer Bar •	Folder, Search, Favorites, Radio and History information is displayed on the left side of thewindow •	click a folder or link to display contents on the right •	click plus to expand or show the sub-folders and minus to hide them Using Old DOS Programs •	many older DOS program will run under Window •	the PIF editor is replaced with a Properties dialogue box •	note that some DOS programs cannot run in a window and require a full screen Using Older Software in MAC OS 10.x •	When Apple OS 10.x tries to open an older version of a program is will run it in Classic mode Switching between tasks (programs/applications/folders) •	depending in your system's resources you can have many programs running at once and easily switch from one to another using various methods •	while hold down Alt, tap the Tab key to cycle through a menu of running tasks •	click on the taskbar or dock icon of the task you want to bring it to the front Hints & Shortcuts The right mouse button is a great feature of the Windows operating system and can be a real time saver. Right click on; •	an empty space of the desktop to change Desktop Properties, •	My Computer to display or modify your computer's properties, •	Network Neighborhood to display and modify your network properties, •	Start menu item to modify it, •	right click an icon to work with it, etc. On a Mac hold the mouse button down to display a context menu. Backing up files Many backup options are done automatically by the computer which will provide various options to recover them in a crisis but a hard drive error can happen at any time and without warning. Be sure to back up all your personal and business data on a regular basis. If you have a second hard drive files can be backed up to that drive. A CD-R can also be used to make a back up or a collection of floppy disks can also be used. When backing up files don't forget your email and address book. Some people also have extensive collections of favorites that can be backed up as well. Check your email, address book and browser for information on backing up these files. Some programs have an export feature that can be useful when making back ups. Different Methods of Opening Documents and Programs •	Open a program and use the Open command in the File menu •	Use the Documents command in the Start or Apple menu to open a recently used document •	Use the Find command in the Start menu or the Sherlock program on a Mac •	Double click on an icon in a Folder •	Right click and choose Open •	Choose Start, Run and type the application (and path) Creating Folders •	Use the New Folder option in the File menu (or right click) to create a folder in the active window Moving and Deleting Files •	Use Drag & Drop to drag the file or folder from one folder to another o	with the right button a menu will appear allowing you to Copy or Move the file or folder (Windows) o	files on the same disk are moved (hold Ctrl to copy) o	files on another disk are copied (hold Ctrl to move) Use the Edit menu to Cut the file and Paste it in the destination folder Hold down Shift while Deleting a file to by pass the Recycle Bin and permanently delete files Multiple Selection •	to select files sequentially click on the first file and move to the last file, hold down shift and click on the last file in the sequence •	to select files non-sequentially click on the first file and hold Ctrl while clicking the rest •	the two methods can be used in combination Organizing your files and icons It is important to develop a filing system early. Create a folder on your Desktop to store your data. Create sub-folders within that folder to sort the various documents, image, sounds and other files that you create and use. A new folder can be created easily and given a logical name which will help organize data. •	My Documents or Documents is the default folder created by the operating system and can be used as is or rename Troubleshooting •	Both Windows and Mac have a number of tools built in to assist in solving computer problems •	Choosing Help allow Window users to access Troubleshooting Wizards that provide step-by-step suggestions •	System Information under System Tools provide valuable information and access to other system tools in Window •	System Profiler under Application, Utilities provide information about the Mac •	Running a Disk Scan occasionally or on a schedule can solve many simple errors