Library of Congress Classification:Class Q -- Science

Class Q: Science is a classification used by the Library of Congress Classification system. This article outlines the subclasses of Class Q.

Q - Science (General)

 * 1-390.......Science (General)
 * 1-295......General
 * 300-390....Cybernetics
 * 350-390...Information theory

QA - Mathematics

 * 1-939..............Mathematics
 * 1-43..............General
 * 47-59.............Tables
 * 71-90.............Instruments and machines
 * 75-76.95.........Calculating machines
 * 75.5-76.95......Electronic computers. Computer science
 * 76.73.A-Z......Individual languages A-Z
 * 76.73.A12.....ABAP
 * 76.73.A24.....ALGOL
 * 76.73.A27.....APL
 * 76.73.A35.....Ada
 * 76.73.A67.....AppleScript
 * 76.73.A8.......Assembly languages. Assemblers
 * 76.73.A84.....AutoLISP
 * 76.73.A95.....AWK
 * 76.73.B155...B
 * 76.73.B3......BASIC
 * 76.73.B78....BSV 753
 * 76.73.C15.....C
 * 76.73.C153....C++
 * 76.73.C154....C#
 * 76.73.C25.....COBOL
 * 76.73.C56.....Clipper
 * 76.73.C58.....CoffeeScript
 * 76.73.C75.....CSP
 * 76.73.C87.....Curl
 * 76.73.D138...D
 * 76.73.D14.....D*
 * 76.73.D23.....Dart
 * 76.73.D25.....DRL
 * 76.73.D95.....Dylan
 * 76.73.E27.....EasyLanguage
 * 76.73.E38.....ELAN
 * 76.73.E75.....ERLANG
 * 76.73.F16.....F
 * 76.73.F23.....FOCUS
 * 76.73.F25.....FORTRAN
 * 76.73.F74.....FRED
 * 76.73.G25....GW-BASIC
 * 76.73.G63....Go
 * 76.73.H37.....Haskell
 * 76.73.H6.......HP-GL/2
 * 76.73.H96.....HyperTalk
 * 76.73.I22.......INFORMIX-4GL
 * 76.73.J2........J#
 * 76.73.J38.....Java
 * 76.73.J39.....JavaScript
 * 76.73.J63.....Job Control Language
 * 76.73.J7.......JR
 * 76.73.K63.....Kodu
 * 76.73.K67.....KornShell
 * 76.73.L23......LISP
 * 76.73.L62......LogiQL
 * 76.73.L63......LOGO
 * 76.73.L66.......LotusScript
 * 76.73.L82.......Lua
 * 76.73.M15......M
 * 76.73.M29......Mathematica
 * 76.73.M35......Maude
 * 76.73.M39......MDX
 * 76.73.M53.....Microsoft Visual Basic
 * 76.73.M6.......ML
 * MySQL see QA76.73.S67
 * 76.73.N39.....NCL
 * 76.73.O115...Objective-C
 * 76.73.O213...OpenCL
 * 76.73.P224....PHP
 * 76.73.P25.....PL/1
 * 76.73.P32......packetC
 * 76.73.P67.....PostScript
 * PowerShell see QA76.73.W56
 * 76.73.P75.....Processing
 * 76.73.P76.....Prolog
 * 76.73.P98.....Python
 * 76.73.R25.....RPG
 * 76.73.R3......R
 * 76.73.R33....Racket
 * 76.73.R83....Ruby
 * 76.73.R87....Rust
 * 76.73.S15.....S
 * 76.73.S27.....SAS
 * 76.73.S28.....Scala
 * 76.73.S34.....Scheme
 * 76.73.S345...Scratch
 * 76.73.S35.....SDL
 * 76.73.S59.....SPARK
 * 76.73.S62.....SPARQL
 * 76.73.S67.....SQL. MySQL
 * 76.73.S95.....Swift
 * 76.73.T44......Tcl
 * 76.73.T97......TypeScript
 * 76.73.U63......UPC
 * 76.73.V27......VBScript
 * Visual Basic see QA76.73.M53
 * 76.73.W56.....Windows PowerShell
 * 76.73.W65.....Wolfram language
 * 76.73.X16......X86 assembly language
 * 76.73.X57......XPath
 * 76.73.X58......XSLT
 * 76.73.Z2.........Z
 * 76.75-76.765...Computer software
 * 76.75...........Periodicals. Societies. Serials
 * 76.751........Congresses
 * 76.752........Dictionaries
 * 76.753........Catalogs
 * 76.754........General works
 * 76.755........Handbooks, tables, etc.
 * 76.756........Addresses, essays, lectures
 * 76.758........Software engineering
 * 76.76.A-Z.....Special topics, A-Z
 * 76.76.A54....AngularJS
 * 76.76.A63....Application program interfaces
 * 76.76.A65....Application software
 * 76.76.A87....Assemblers
 * 76.76.A98....Automatic differentiations
 * 76.76.C47....Certification of software
 * 76.76.C54....Children's software
 * 76.76.C64....Compatibility of software
 * 76.76.C65....Compilers
 * 76.76.C66....Component software
 * 76.76.C672...Computer games
 * 76.76.C68....Computer viruses
 * 76.76.C69....Configuration management
 * 76.76.C73....Costs
 * 76.76.D47....Development
 * 76.76.D49....Device drivers
 * 76.76.D57....Disassemblers Including decompilers
 * 76.76.D63....Documentation of software
 * 76.76.E93....Evaluation of software
 * 76.76.E95....Expert systems
 * 76.76.F34....Failures of software
 * 76.9.F48.....File conversion software
 * 76.76.F75....Free computer software
 * 76.76.G46....Generators
 * 76.76.H85....Human factors
 * 76.76.H94....Hypertext systems Including hypertext document markup languages, e. g. HTML (Document markup language), etc.
 * 76.76.I55....Install programs
 * 76.76.I57....Integrated software
 * 76.76.I58....Intelligent agents
 * 76.76.I59....Interactive media. Hypermedia
 * 76.76.S65....Measurement, Software
 * 76.76.M52....Microsoft .NET
 * 76.76.M54....Middleware Including object monitors
 * 76.76.O63....Operating systems Including DOS, UNIX, OS/2, etc.
 * 76.76.P37....Patterns, Software
 * 76.76.P74....Productivity
 * 76.76.P76....Protection of software
 * 76.76.Q35....Quality control
 * 76.76.R42....Refactoring of software
 * 76.76.R44....Reliability
 * 76.76.R47....Reusability
 * 76.76.S27.....SAP NetWeaver Gateway
 * 76.76.S37....Screen savers
 * 76.76.S375...Self-adaptive software
 * 76.76.S46....Shareware
 * 76.76.F34....Software failures
 * 76.76.S63....Software frameworks
 * 76.76.S64....Software maintenance
 * 76.76.S65....Software measurement
 * 76.76.S66....Software support
 * 76.76.S69....Spyware
 * 76.76.S73....Standards for software
 * 76.76.S95....Systems software
 * 76.76.T45....Teleprocessing monitors
 * 76.76.T47....Termination
 * 76.76.T48....Testing of software
 * 76.76.T49....Text editors
 * 76.76.T55....Threads
 * 76.76.T83....Translators
 * 76.76.U84....Utilities
 * 76.76.V47....Verification and validation of software
 * 76.76.C68....Viruses
 * 76.76.W56....Windows
 * 76.76.S64....Year 2000 date conversion
 * 76.765........Firm-ware
 * 76.77.........Operating Systems
 * 76.76.T48.........General works
 * 76.774.A-Z........Individual operating systems. By system, A-Z
 * 76.774.A53........Android
 * 76.774.B47........Berkeley BSD
 * 76.774.D67........DOS
 * 76.774.F74........FreeBSD
 * 76.774.I67........iOS
 * 76.774.L46........Linux
 * 76.774.M33........Mac OS
 * 76.774.M43........Microsoft Windows 7
 * 76.774.M434.......Microsoft Windows 8
 * 76.774.M435.......Microsoft Windows 10
 * 76.774.M48........Microsoft Windows Me
 * 76.774.M53........Microsoft Windows NT
 * 76.774.M55........Microsoft Windows server
 * 76.774.M56........Microsoft Windows Vista
 * 76.774.M58........Microsoft Windows XP
 * 76.774.S65........Solaris
 * 76.774.U28........Ubuntu
 * 76.774.U64........UNIX
 * 76.8.A-Z......Special computers, computer systems, and microprocessors. By name, A-Z
 * 76.8.A54......AN/FSQ-7
 * 76.8.A54......AN/FSQ-7


 * 101-145...........Elementary mathematics. Arithmetic
 * 150-272.5.........Algebra
 * 273-280...........Probabilities. Mathematical statistics
 * 299.6-433.........Analysis
 * 440-699...........Geometry. Trigonometry. Topology
 * 801-939...........Analytic mechanics

QB - Astronomy

 * 1-991..........Astronomy
 * 1-139.........General
 * 140-237.......Practical and spherical astronomy
 * 275-343.......Geodesy
 * 349-421.......Theoretical astronomy and celestial mechanics
 * 455-456.......Astrogeology
 * 460-466.......Astrophysics
 * 468-480.......Non-optical methods of astronomy
 * 495-903.......Descriptive astronomy
 * 500.5-785....Solar System
 * 799-903......Stars
 * 980-991.......Cosmology

QC - Physics

 * 1-999..............Physics
 * 1-75..............General
 * 81-114............Weights and measures
 * 120-168.85........Descriptive and experimental mechanics
 * 170-197...........Atomic physics. Constitution and properties of matter including molecular physics, relativity, quantum theory and solid state physics
 * 221-246...........Acoustics. Sound
 * 251-338.5.........Heat
 * 310.15-319.......Thermodynamics
 * 350-467...........Optics. Light
 * 450-467..........Spectroscopy
 * 474-496.9.........Radiation physics (General)
 * 501-766...........Electricity and magnetism
 * 501-721..........Electricity
 * 669-675.8.......Electromagnetic theory
 * 676-678.6.......Radio waves (Theory)
 * 680.............Quantum Electrodynamics
 * 701-715.4.......Electric discharge
 * 717.6-718.8.....Plasma physics. Ionized gases
 * 750-766..........Magnetism
 * 770-798...........Nuclear and particle physics. Atomic energy. Radioactivity
 * 793-793.5........Elementary particle physics
 * 794.95-798.......Radioactivity and radioactive substances
 * 801-809...........Geophysics. Cosmic physics
 * 811-849...........Geomagnetism
 * 851-999...........Meteorology. Climatology (including the Earth's atmosphere)
 * 974.5-976........Meteorological optics
 * 980-999..........Climatology and weather
 * 994.95-999......Weather forecasting

QD - Chemistry

 * 1-999..............Chemistry
 * 1-65..............General (including alchemy)
 * 71-142............Analytical chemistry
 * 146-197...........Inorganic chemistry
 * 241-441...........Organic chemistry
 * 415-436..........Biochemistry
 * 450-801...........Physical and theoretical chemistry
 * 625-655..........Radiation chemistry
 * 701-731..........Photochemistry
 * 901-999...........Crystallography

QE - Geology

 * 1-996.5............Geology
 * 1-350.62..........General (including geographical divisions)
 * 351-399.2.........Mineralogy
 * 420-499...........Petrology
 * 500-639.5.........Dynamic and structural geology
 * 521-545..........Volcanoes and earthquakes
 * 601-613.5........Structural geology
 * 640-699...........Stratigraphy
 * 701-760...........Paleontology
 * 760.8-899.2.......Paleozoology
 * 901-996.5.........Paleobotany

QH - Natural history - Biology

 * 1-278.5............Natural History (General)
 * 1-199.5...........General (including nature conservation, geographical distribution)
 * 201-278.5.........Microscopy
 * 301-705.5..........Biology (General)
 * 359-425...........Evolution
 * 426-470...........Genetics
 * 471-489...........Reproduction
 * 501-531...........Life
 * 540-549.5.........Ecology
 * 573-671...........Cytology
 * 705-705.5.........Economic biology

QK - Botany

 * 1-989..............Botany
 * 1-474.5...........General (including geographical distribution)
 * 474.8-495.........Spermatophyta. Phanerogams
 * 494-494.5........Gymnosperms
 * 495..............Angiosperms
 * 504-638...........Cryptogams
 * 640-707...........Plant anatomy
 * 710-899...........Plant physiology
 * 900-989...........Plant ecology

QL - Zoology

 * 1-991..............Zoology
 * 1-355.............General (including geographical distribution)
 * 360-599.82........Invertebrates
 * 461-599.82.......Insects
 * 605-739.8.........Chordates. Vertebrates
 * 614-639.8........Fishes
 * 640-669.3........Reptiles and amphibians
 * 671-699..........Birds
 * 700-739.8........Mammals
 * 750-795...........Animal behavior
 * 791-795..........Stories and anecdotes
 * 799-799.5.........Morphology
 * 801-950.9.........Anatomy
 * 951-991...........Embryology

QM - Human anatomy

 * 1-695..............Human anatomy
 * 1-511.............General
 * 531-549...........Regional anatomy
 * 550-577.8.........Human and comparative histology
 * 601-695...........Human embryology

QP - Physiology

 * 1-981..............Physiology
 * 1-345.............General (including influence of the environment)
 * 351-495...........Neurophysiology and neuropsychology
 * 501-801...........Animal biochemistry
 * 901-981...........Experimental pharmacology

QR - Microbiology

 * 1-502..............Microbiology
 * 1-74.5............General
 * 75-99.5...........Bacteria
 * 99.6-99.8.........Cyanobacteria
 * 100-130...........Microbial ecology
 * 171...............Microorganisms in the animal body
 * 180-198.5.........Immunology
 * 355-502...........Virology