Computer humour

Computer humour, also known as hacker humour, is humour on the subject of computers or their users.

Examples
Examples of computer humour include:
 * "Any key", taken to mean pressing the (non-existent) "Any" key rather than any key
 * April Fools' Day Request for Comments
 * Bastard Operator From Hell, a fictional rogue computer operator
 * Blinkenlights, a neologism for diagnostic lights
 * Bogosort, a portmanteau of the words bogus and sort
 * COMEFROM, an obscure programming language control flow structure, originally as a joke
 * "The Complexity of Songs", a journal article published by computer scientist Donald Knuth in 1977 as an in-joke about computational complexity theory
 * The Computer Contradictionary, a non-fiction book by Stan Kelly-Bootle that compiles a satirical list of definitions of computer industry terms
 * The Daily WTF, a humorous blog dedicated to "Curious Perversions in Information Technology"
 * Dilbert, an American comic strip
 * Easter egg, an intentional inside joke, hidden message or image, or secret feature of a work
 * List of Google Easter eggs
 * List of Easter eggs in Microsoft products
 * The Book of Mozilla
 * Elephant in Cairo, in computer programming, a piece of data inserted at the end of a search space, which matches the search criteria, in order to make sure the search algorithm terminates; it is a humorous example of a sentinel value
 * Evil bit, a fictional IPv4 packet header field
 * Eyeball search, humorous terminology
 * FINO (first in, never out) (sometimes seen as "FISH", for first in, still here), a humorous scheduling algorithm, as opposed to traditional first in, first out (FIFO) and last in, first out (LIFO)
 * Garbage in, garbage out (GIGO), the concept that flawed, or nonsense input data produces nonsense output
 * J. Random Hacker, an arbitrary programmer (hacker)
 * Halt and Catch Fire (HCF), an idiom referring to a computer machine code instruction that causes the computer's CPU to cease meaningful operation
 * Hex, a fictional computer featured in the Discworld novels by Terry Pratchett
 * Hexspeak, like leetspeak, a novelty form of spelling using the hexadecimal digits
 * Hyper Text Coffee Pot Control Protocol (HTCPCP), a facetious communication protocol for controlling, monitoring, and diagnosing coffee pots
 * Interactive EasyFlow, a diagramming and flow charting software package that included a humorous software licence This is where the bloodthirsty licensing agreement is supposed to go...
 * Internet Oracle, an effort at collective humor in a pseudo-Socratic question-and-answer format
 * IP over Avian Carriers, a joke proposal to carry IP traffic by birds such as homing pigeons
 * It's Geek 2 Me, a tech cartoon
 * Jargon File, a glossary and usage dictionary of slang used by computer programmers
 * The Joy of Tech, a webcomic
 * Kitchen Table International, a fictitious computer company
 * Kremvax, originally a fictitious Usenet site at the Kremlin, named like the then large number of Usenet VAXen with names of the form "foovax"
 * lp0 on fire (also known as Printer on Fire), is an outdated error message generated on some Unix and Unix-like computer operating systems in response to certain types of printer errors
 * Magic smoke (also factory smoke, blue smoke, angry pixies, or the genie), a humorous name for the caustic smoke produced by burning out electronic circuits or components
 * Ninety–ninety rule: "the first 90% of the code accounts for the first 90% of the development time. The remaining 10% of the code accounts for the other 90% of the development time"
 * Null device, in programmer jargon, the bit bucket or black hole
 * PC LOAD LETTER or PC LOAD A4, a printer error message that has entered popular culture as a technology meme referring to a confusing or inappropriate error message
 * Slowsort, a humorous, not useful, sorting algorithm
 * The Tao of Programming, a 1987 book by Geoffrey James
 * TPS report, Testing Procedure Specification, has come to mean pointless, mindless paperwork
 * User error, an error made by the human user of a complex system. Related slang terms include PMAC ("problem exists between monitor and chair"), identity error or ID-10T/1D-10T error ("idiot error"), PICNIC ("problem in chair, not in computer"), IBM error ("idiot behind machine error")
 * User Friendly, a former daily webcomic
 * Working Daze, a comic strip
 * Write-only memory (joke)
 * xkcd, a webcomic
 * Zaltair, a fictional computer created by Steve Wozniak