acrobase.txt

# This is an all-caps term->expansion definition file, ASCII-only format
# To be used with soyacro.py or similar application
# Each entry all on one line with 3 elements; ASCII characters only, no HTML:
#    ALL-CAPSorNUMBERS-NOTHING-ELSE-TERM, or a single * to indicate component matching
#    A-SINGLE-COMMA
#    Nothing OR replacement for term, ie MHZ,MHz,Megahertz, or component designator
#    A-SINGLE-COMMA
#    Expansion, separate multiples with '|'. Use | for actual pipes.
# Examples:
#    MHZ,MHz,Megahertz
#    AL,,Alabama (USA)|Artificial Life
#    *,R,Resistor
#    *,VR,Voltage Regulator|Variable Resistor
#
# Tecnically, thhe order of entries and multiple definitions does not matter
# here, as the soyacro.py application sorts them before applying them. However,
# for hand-editing this file, it's much easier if the actual terms are in order.
# ------------------------------------------------------------------------------

# These match electronic components:
# ----------------------------------
*,ANT,Antenna
*,AT,Attenuator
*,BR,Bridge Rectifier
*,BT,Battery
*,C,Capacitor
*,CN,Capacitor Network
*,CRT,Cathode Ray Tube
*,D,Diode
*,DS,Display
*,DSP,Digital Signal Processor
*,F,Fuse
*,FB,Ferrite Bead
*,FET,Field Effect Transistor
*,FL,Filter
*,G,Generator|Oscillator
*,GN,General Network
*,H,Hardware
*,HY,Circulator|Directional Coupler
*,IC,Integrated Circuit
*,J,Jack
*,JFET,Junction Field Effect Transistor
*,JP,Jumper
*,K,Relay|General Contactor
*,LCD,Liquid Crystal Display
*,LED,Light-Emitting Diode
*,L,Inductor
*,LS,Loudspeaker|Buzzer
*,MIC,Microphone
*,MK,Microphone
*,MP,Mechanical Part
*,M,Motor
*,MOSFET,Metal Oxide Semiconductor Field Effect Transistor
*,MOV,Metal Oxide Varistor
*,NE,Neon Bulb
*,NTC,Negative Temperature Coefficient (thermistor)
*,PCB,Printed Circuit Board
*,P,Plug
*,PS,Power Supply
*,PTC,Positive Temperature Coefficient (thermistor)
*,Q,Transistor
*,R,Resistor
*,RT,Thermistor
*,RY,Relay
*,RV,Varistor
*,SCR,Silicon Controlled Rectifier
*,S,Switch
*,SW,Switch
*,TC,Thermocouple
*,TFT,Thin-Film Transistor display
*,TH,Termistor
*,TP,Test Point
*,TUN,Tuner
*,T,Transformer
*,U,Integrated Circuit
*,VC,Variable Capacitor
*,VR,Voltage Regulator|Variable Resistor
*,V,Vacuum Tube
*,XA,Printed Circuit Assembly Connector
*,XU,Integrated Circuit Connector
*,XDS,Light Socket
*,XV,Vacuum Tube Socket Connector
*,XF,Fuseholder
*,XTAL,Crystal
*,Y,Crystal|Oscillator
*,Z,Zener Diode

# These match fixed terms:
# ------------------------
1802,,An RCA 8-bit CPU
2D,,Two Dimensional
2FA,,Two Factor Authentication
3D,,Three Dimensional
401K,401(k),Retirement savings plan
411,,A shorthand for: Information
420,,A shorthand for: Time to smoke some pot
4G,,Fourth Generation wireless
5G,,Fifth Generation wireless
6809,,A Motorola 8-bit CPU
69,,A shorthand for: Mutual inverted oral sex activities
707,,A passenger aircraft
727,,A passenger aircraft
737,,A passenger aircraft
73,,A shorthand for: Goodbye
747,,A passenger aircraft
8080,,An Intel 8-bit CPU
A320,,A passenger aircraft
AA,,Alcoholics Anonymous
AAA,,American Automobile Association
AB,,Alberta (Canada)
ABA,,American Bar Association
ABC,,American Broadcasting Company|Australian Broadcasting Corporation
ABM,,Anti-Ballistic Missile
ABS,,Automatic Braking System
AC,,Anonymous Coward|Alternating Current|Air Conditioning
ACA,,Affordable Care Act (US, AKA Obamacare)
ACM,,Association for Computing Machinery
ACLU,,American Civil Liberties Union
ACS,,American Chemical Society
ACT,,Air Channel Transistor
ADA,,Americans with Disabilities Act (US)
AD,,Anno Domini (in the year of the Lord)
ADC,,Analog to Digital Converter
ADD,,Attention Deficit Disorder
AES,,Advanced Encryption Standard
AFAIAC,,As Far As I Am Concerned
AFAIK,,As Far As I Know
AF,,Audio Frequency
AFK,,Away From Keyboard
AFRL,,Air Force Research Laboratory
AFSK,,Audio Frequency Shift Keying - using audio tones to encode data
AG,,Attorney General|Aerographer's mate (US navy)
AGC,,Automatic Gain Control
AGI,,Artificial General Intelligence
AGU,,American Geophysical Union
AGW,,Anthropogenic Global Warming
AI,,Artificial Intelligence
AIDS,,Acquired ImmunoDeficiency Syndrome
AKA,,Also Known As
AK,,Alaska (USA)
AL,,Alabama (USA)|Artificial Life
ALC,,Automatic Level Control
ALS,,Amyotrophic Lateral Sclerosis AKA as Lou Gehrig's disease
AMA,,Ask Me Anything|Against Medical Advice|American Medical Association
AM,,Amplitude Modulation|Ante Meridiem - before midday
AMD,,Advanced Micro Devices
AMEX,,American Stock Exchange|American Express
AMOLED,,Active Matrix Organic Light Emitting Diode
AMP,,Accelerated Mobile Pages
AMS,,AM Stereo (radio)
AMSAT,,AMateur SATellite Corporation
AMZN,,Amazon's stock ticker symbol
AND,,AND gate: input 1 AND input 2 = output
ANR,,Automatic Noise Reduction
ANSI,,American National Standards Institute
AOL,,America OnLine (a digital services provider)
AP,,Access Point|Associated Press
APA,,American Psychological Association
APFS,,APple File System
API,,Application Programmer Interface
APL,,A Programming Language|APpLe stock symbol
APP,,Application|Advanced Placement Program
APRS,,Automatic Packet Reporting System
APSC,APS-C,22.2 x 14.8 mm image sensor size (Canon) and 23.5-23.7 x 15.6 mm for others
APU,,Accelerated Processing Unit
AR,,Arkansas (USA)|Augmented Reality
ARC,,Amatuer Radio Club
ARM,,A class of CPUs
ARRL,,American Radio Relay League (Amateur radio)
ASAP,,As Soon As Possible
ASCII,,American Standard Code For Information Interchange (a 7-bit code)
ASIC,,Application-Specific Integrated Circuit
ASPCA,,American Society for the Prevention of Cruelty to Animals
ASUS,,ASUS is a Taiwan-based, multinational computer hardware and consumer electronics company, established 1989.
ATLAS,,Asteroid Terrestrial-impact Last Alert System
ATM,,Automated Teller Machine|At The Moment|Asynchronous Transfer Mode
ATT,AT&T,American Telephone and Telegraph company
ATU,,Antenna Tuning Unit
ATV,,All Terrain Vehicle
AU,,Astronomical Unit|Australia
AV,,Autonomous Vehicle|Audio-Video
AWG,,Atmospheric Water Generator|American Wire Gauge
AWOL,,Absent Without Official Leave
AWS,,Amazon Web Services
AWSSI,,Accumulated Winter Season Severity Index
AZ,,Arizona (USA)
BASIC,,Beginner's All-purpose Symbolic Instruction Code
BATF,,Bureau of Alcohol, Tobacco, and Firearms (US)
BB,,A small, round projectile
BBC,,British Broadcasting Corporation
BBIAB,,Be Back In A Bit
BC,,British Columbia (Canada)|Before Christ|BroadCast (radio)
BCB,,BroadCast Band (radio)
BCC,,Blind Carbon Copy
BDAC,,Broadband Deployment Advisory Committee
BEV,,Battery Electric Vehicle
BF,,BoyFriend
BFE,,Bum Fuck Egypt (middle of nowhere)
BFF,,Best Female Friend
BFO,,Beat Frequency Oscillator
BFR,,Big Fucking Rocket / Big Falcon Rocket (now "Super Heavy")
BFS,,Big Fucking Spaceship / Big Falcon Spaceship (now "Starship")
BI,,Bisexual
BIOS,,Basic Input Output System
BLM,,Bureau of Land Management (US)
BMI,,Body Mass Index
BND,,Bundesnachrichtendienst - Federal Intelligence Service (German)
BOM,,Bill Of Materials
BP,,Blood Pressure|British Petroleum
BPF,,Band Pass Filter
BS,,Bachelor of Science|BullShit
BSD,,Berkeley Software Distribution
BSOD,,Blue Screen Of Death
BTC,,BiTCoin
BTW,,By The Way
BW,,Black and White (imaging)|Bandwidth
BYOB,,Bring Your Own Bottle|Bring Your Own Booze
CA,,California (USA)
CAD,,Computer Aided Design|Canadian Dollars
CAGR,,Compound Annual Growth Rate
CAM,,Computer Aided Manufacturing
CAPTCHA,,Completely Automated Public Turing test to tell Computers and Humans Apart
CB,,Citizen's Band radio
CBC,,Canadian Broadcasting Corporation|Complete Blood Count|Criminal Background Check|Congressional Black Caucus
CBD,,Cannabidiol
CBO,,Congressional Budget Office
CBP,,Customs and Border Protection (US)
CBS,,Columbia Broadcasting System
CC,,Carbon Copy|Credit Card|Creative Commons
CCTV,,Closed Circuit TeleVision|China Central Television
CDC,,Center for Disease Control (US)
CD,,Compact Disk
CDD,,Customer Due Diligence|Community Driven Development
CDT,,Central Daylight Time
CE,,Current Era
CEO,,Chief Executive Officer
CEQA,,California Environmental Quality Act (US)
CERN,,European Organization for Nuclear Research (French orig., Conseil Européen pour la Recherche Nucléaire)
CES,,Consumer Electronics Show
CFC,,ChloroFluoroCarbon
CFD,,Computational Fluid Dynamics
CFO,,Chief Financial Officer
CHD,,CardHolder Data
CGI,,Common Gateway Interface|Computer Generated Imagery
CIA,,Central Intelligence Agency (US)
CIO,,Chief Information Officer
CIS,,Cisgender - where sense of identity corresponds to birth sex
CIT,,California Institute of Technology
CLI,,Command Line Interface
CMOS,,Complementary Metal Oxide Semiconductor
CLPS,,Commercial Lunar Payload Services
CMS,,Content Management System
CMY,,Cyan, Magenta, Yellow
CMYK,,Cyan, Magenta, Yellow, Black
CNC,,Computer Numeric Control (manufacturing tools)
CNN,,Cable News Network|Convolutional Neural Network
CNSA,,China National Space Administration
CO2,,1 carbon atom, 2 oxygen atoms: Carbon Dioxide
CO,,Colorado (USA)|Carbon Monoxide
COBOL,,Common Business-Oriented Language
COD,,Cash On Delivery
COM,,COMmunications
COO,,Chief Operating Officer
COP,,Conference Of the Parties (UNFCCC)
CORBA,,Common Object Request Broker Architecture
CP,,Child Porn
CPM,CP/M,An OS for the 8080 microprocessor: Control Program for Microcomputers
CPR,,CardioPulmonary Resusitation
CPS,,Crown Prosecution Service (England/UK)
CPU,,Central Processing Unit
CQ,,General radio call, read as "seek you"
CQUAM,C-QUAM,Compatible QUadrature Amplitude Modulation
CRA,,Computing Research Association|Congressional Review Act
CRISPR,,Clustered Regularly Interspaced Short Palindromic Repeats - genetic editing tool
CRT,,Cathode Ray Tube
CS,,Computer Science
CSG,,Constructive Solid Geometry
CSS,,Cascading Style Sheet - a means to indirectly format HTML
CST,,Central Standard Time
CT,,Connecticut (USA)|Central Time
CTBTO,,Comprehensive nuclear-Test-Ban Treaty Organization
CTO,,Chief Technology Officer
CTRL,,Control
CUDA,,Compute Unified Device Architecture
CUL,,See You Later
CV,,Computer Vision|Curriculum Vitae (latin: "course of life")
CVE,,Common Vulnerabilities and Exposures
CVSS,,Common Vulnerability Scoring System
CVT,,Continuously Variable Transmission
CVV,,Card Verification Value
CVV2,,Card Verification Value 2
CW,,Continous Wave (only) transmissions (generally Morse Code)
CYA,,Cover Your Ass
DAC,,Digital to Analog Converter
DACA,,Deferred Action for Childhood Arrivals
DARPA,,Defense Advanced Research Projects Agency
DB,,Database
DBMS,,Database Management System
DC,,Direct Current|Washington DC (District of Columbia) (USA)
DD,,2-digit day, 01-31
DDOS,DDoS,Distributed Denial of Service
DDT,,DichloroDiphenylTrichloroethane, an insecticide, mostly banned
DEA,,Drug Enforcement Agency (US)
DE,,Delaware (USA)
DEFCON,,DEFense CONdition
DGPS,,Differential Global Positioning System
DHCP,,Dynamic Host Configuration Protocol
DHS,,Department of Homeland Security (US)
DIAF,,Die In A Fire
DIMM,,Dual Inline Memory module
DIN,,German institute, similar to US ANSI
DIP,,Dual Inline Package
DIY,,Do It Yourself
DJ,,Disc Jockey
DMA,,Direct Memory Access
DMR,,Digital Mobile Radio
DNA,,DeoxyriboNucleic Acid: chemically encodes genetic information
DNC,,Democratic National Convention|Democratic National Committee
DNN,,Deep Neural Network
DNS,,Domain Name System
DOB,,Date Of Birth
DOD,,Department Of Defense (US)
DOE,,Department Of Energy (US)
DOH,DoH,DNS-over-HTTPS
DOI,,Department of the Interior (US)|Digital Object Identifier
DOJ,,Department Of Justice (US)
DOS,,Disk Operating System|Denial Of Service
DOT,,Department Of Transportation (US)
DPI,,Dots Per Inch
DRAM,,Dynamic Random Access Memory - access any part at any time, but must keep refreshing it or it forgets
DR,,Didn't Read|Doctor|Democratic Republic|Dynamic Range
DRM,,Digital Rights Management|Digital Radio Mondial (a digital broadcast format)
DSA,,Democratic Socialists of America
DSL,,Digital Subscriber Line
DSLR,,Digital Single-Lens Reflex (camera)
DSP,,Digital Signal Processor
DSS,,Data Security Standard
DTMF,,Dual Tone Multi Frequency (touch-tone encoding)
DUI,,Driving Under the Influence (of drugs)
DUVL,,Deep UltraViolet Lithography
DVD,,Digital Video Disk
DVM,,Digital VoltMeter|Doctor of Veterinary Medicine
DVR,,Digital Video Recorder
DX,,Distance, in radio reception
ECC,,Error Correcting Code
ECG,,ElectroCardioGram
ECU,,Engine Control Unit
ED,,Emergency Department|Erectile Dysfunction
EDT,,Eastern Daylight Time
EE,,Electrical/Electronic Engineering
EEG,,Eastern European Group
EELV,,Evolved Expendable Launch Vehicle
EEOC,,Equal Employment Opportunity Commission (US)
EEPROM,,Electrically Erasable Programmable Read-Only Memory - normally read-only, but can be erased
EEU,,Eurasian Economic Union
EFF,,Electronic Frontier Foundation
EG,e.g.,exempli gratia: "for example"
EHF,,Extremely High Frequency: 30-300 GHz
EKG,,Electro(C/k)ardioGram
EM,,Electro-Magnetic
EME,,Earth-Moon-Earth (communications)
EMACS,Emacs,Editing MACroS
EMM,,Extended Memory Manager
EMP,,Electro-Magnetic Pulse
EMS,,Emergency Medical Services
EMT,,Emergency Medical Technician
ENSO,,El Niño/Southern Oscillation
EO,,Executive Order
EOF,,End Of File
EOL,,End Of Line
EPA,,Environmental Protection Agency (US)
EPIC,,Electronic Privacy Information Center	
EPROM,,Erasable Programmable Read-Only Memory - normally read-only, but can be erased
EPS,,Encapsulated PostScript
ER,,Emergency Room
ERP,,Effective Radiated Power
ERU,,Energy Recovery Unit
ESA,,European Space Agency
ESC,,Escape key or keycode $1B
ESO,,European Southern Observatory
ESPN,,Entertainment and Sports Programming Network
EST,,Eastern Standard Time
ET,,Eastern Time|Extra-Terrestrial
EU,,European Union
EULA,,End User License Agreement
EUVL,,Extreme UltraViolet Lithography
EV,,Electric Vehicle
EVIL,,Electronic Viewfinder Interchangeable Lens
EVP,,Executive Vice President
EXIF,,EXchangeable Image File format
FA,,Fucking Article
FAA,,Federal Aviation Administration (US)
FAI,,World Air Sports Federation (Swiss)
FAQ,,Frequently Asked Questions
FARC,,Fuerzas Armadas Revolucionarias de Colombia
FAS,,Fetal Alcohol Syndrome
FAX,,Facsimile transmission
FB,,Facebook|Fine Business
FBI,,Federal Bureau of Investigation (US)
FBO,,Federal Budget Office (US)
FCC,,Federal Communications Commission (US)
FCEV,,Fuel Cell Electric Vehicle
FDA,,Food and Drug Administration (US)
FDIC,,Federal Deposit Insurance Corporation (US)
FDM,,Frequency Division Multiplexing
FEC,,Forward Error Correction
FEM,,Finite Element Method
FEMA,,Federal Emergency Management Agency (US)
FF,,Full frame: 36 x 24 mm sensor size|Fast Forward
FFS,,For Fuck's Sake
FHA,,Federal Housing Administration (US)
FIFO,,First In, First Out
FIOS,,FIber Optic Service
FISA,,Foreign Intelligence Surveillance Act
FISC,,Foreign Intelligence Surveillance Court
FLEX,,An OS for the 6800 and 6809 microprocessors
FL,,Florida (USA)
FLOPS,,FLoating Point OPerations per Second
FLOTUS,,First Lady Of The United States
FM,,Frequency Modulation|Foreign Minister|Finance Minister
FML,,Fuck My Life
FOIA,,Freedom Of Information Act (US)
FORTRAN,,A computer language, "FORmula TRANSlator"
FOSS,,Free and Open Source Software
FOSTA,,Fight Online Sex Trafficking Act (US)
FP,,Front Page
FP16,,16-bit Floating Point
FP32,,32-bit Floating Point
FPGA,,Field-Programmable Gate Array
FPU,,Floating Point Unit
FS,,Fucking Summary
FSB,,Federal Security Service (Russian Federation)
FSF,,Free Software Foundation
FSK,,Frequency Shift Keying
FSM,,Flying Spaghetti Monster
FTC,,Federal Trade Commission (USA)
FTFY,,Fixed That For You
FTP,,File Transfer Protocol
FTW,,For The Win
FUBAR,,Fucked Up Beyond All Recovery
FU,,Fuck You
FWIW,,For What It's Worth
FX,,Effects
FYI,,For Your Information
G20,,Group of 20 (countries)
GA,,Georgia (USA)
GAN,,Generative Adversarial Network
GAO,,Government Accountability Office (US)
GB,,Gigabyte
GCC,,GNU Compiler Collection|Gulf Cooperation Council
GCF,,Gender Critical Feminist
GCHQ,,Government Communications HeadQuarters (UK)
GDP,,Gross Domestic Product|General Data Protection
GDPR,,General Data Protection Regulation (EU)	
GEO,,GEOstationary orbit
GFLOPS,,Giga FLoating Point OPerations per Second
GGP,,Great Grandparent (usually parent of parent of parent post)
GHZ,GHz,Gigahertz - Billions of cycles per second
GIF,,Graphics Interchange Format - stores either still or animated images
GI,,Gastro-Intestinal|soldier, rank of private, US army (from "Galvanized Iron")
GIGO,,Garbage In, Garbage Out
GIMP,,GNU Image Manipulation Program
GLONASS,,Globalnaya Navigazionnaya Sputnikovaya Sistema: Global Navigation Satellite System (Russian)
GM,,General Motors|General Manager
GMO,,Genetically Modified Organism
GMT,,Greenwich Mean Time (equivalent to Coordinated Universal Time)
GNU,,GNU's Not Unix (a recursive definition!)
GOP,,Grand Old Party (Republican party, USA)
GP,,GrandParent (usually parent of parent post)|General Practitioner (medical)
GPH,,Gallons Per Hour
GPIO,,General Purose Input Output
GPL,,General Public License
GPS,,Global Positioning System
GSA,,Government Services Authority (US)
GT,,Grand Touring
GPU,,Graphics Processing Unit
GUI,,Graphic User Interface
H1B,,Non-immigrant visa (US)
H2O,,2 hydrogen atoms, 1 oxygen atom: water
HAM,Ham,Amatuer radio operators
HAMR,,Heat-Assisted Magnetic Recording
HBO,,Home Box Office (US media)
HD,,Hard Disk|High Definition
HDCP,,High Definition Copy Protocol
HDD,,Hard Disk Drive
HDL,,Hardware Description Language
HDMI,,High Definition Multimedia Interface
HDR,,High Dynamic Range
HEX,,Hexadecimal - base 16 numbers, used because one HEX digit conveniently equals four binary digits
HF,,High Frequency: 3-30 MHz
HFCS,,High Fructose Corn Syrup
HIFI,HiFi,High Fidelity
HI,,Hawaii (USA)
HIG,,Human Interface Guidelines
HIPAA,,Health Insurance Portability and Accountability Act (US)
HIRISE,HiRISE,High Resolution Imaging Science Experiment
HIV,,Human Immunodeficiency Virus
HM,,Her Majesty
HMCS,,Her Majesty's Canadian Ship
HMS,,Her Majesty's Ship
HN,,Hacker News
HOA,,Home Owner's Association
HP,,Hewlett-Packard (company)|Highway Patrol (officer)|HorsePower
HPC,,High-Performance Computing
HPF,,High Pass Filter
HPV,,Human Papilloma Virus
HQ,,HeadQuarters
HR,,Human Resources
HRW,,Human Rights Watch
HT,,Handie-Talky, AKA Walkie-Talkie - a handheld radio transceiver
HTH,,Hope That Helped|Here To Help|Happy To Help
HTML2,,HyperText Markup Language version 2
HTML3,,HyperText Markup Language version 3
HTML4,,HyperText Markup Language version 4
HTML5,,HyperText Markup Language version 5
HTML,,HyperText Markup Language (in general, also version 1)
HTTP,,HyperText Transfer Protocol
HTTPS,,HyperText Transfer Protocol, Secure
HUD,,Housing and Urban Development (US)|Heads-Up Display
HVM,,High Volume Manufacturing
HWP,,HighWay Patrol|Height Weight Proportional
HZ,Hz,Hertz (cycles per second)
IA,,Iowa (USA)
IANAL,,I Am Not A Lawyer
IBIS,,In-Body Image Stabilization
IBM,,International Business Machines
ICANN,,Internet Corporation For Assigned Names And Numbers
ICBM,,Intercontinental Ballistic Missile
ICE,,Immigration and Customs Enforcement (US)
IC,,Integrated Circuit|Insenstive Clod
ICMP,,Internet Control Message Protocol
IDC,,I Don't Care
IDE,,Integrated Development Environment (for example editor + compiler + linker)
IDF,,Israel Defense Forces
IDGAD,,I Don't Give A Damn
IDGAF,,I Don't Give A Fuck
ID,,Idaho (USA)|Identification
IDK,,I Don't Know
IE,,Internet Explorer|IE sometimes for i.e., is id est "for example""
IE2,,Internet Explorer v2
IE3,,Internet Explorer v3
IE4,,Internet Explorer v4
IE5,,Internet Explorer v5
IE6,,Internet Explorer v6
IE7,,Internet Explorer v7
IE8,,Internet Explorer v8
IE9,,Internet Explorer v9
IE10,,Internet Explorer v10
IE11,,Internet Explorer v11
IED,,Improvised Explosive Device
IEEE,,Institute of Electrical and Electronics Engineers
IF,,Intermediate Frequency
IHOP,,International House of Pancakes
IIRC,,If I ReCall|If I Recall Correctly
IIS,,Internet Information Services
IL,,Illinois (USA)
ILC,,Interchangeable Lens Camera
IMDB,IMDb,Internet Movie Database
IMF,,International Monetary Fund
IMHO,,In My Humble Opinion|In My Honest Opinion
IMO,,In My Opinion
INF,,Intermediate-range Nuclear Forces (treaty)
IN,,Indiana (USA)
IOC,,International Olympic Committee
IOS,iOS,An Apple Operating System (iPad,iPhone)
IOT,IoT,Internet Of Things
IOW,,In Other Words
IP,,Internet Protocol (often a specific Internet address)|Intellectual Property
IPC,,InterProcess Communications
IPO,,Initial Public Offering
IPSC,iPSC,induced Plutipotent Stem Cells
IPV4,IPv4,Internet Protocol, 32-bit
IPV6,IPv6,Internet Protocol, 128-bit
IQ,,Intelligence Quotient|I/Q phases of data encoding
IR,,InfraRed
IRA,,Individual Retirement Account|Irish-Republican Army
IRC,,Internet Relay Chat|International Reply Coupon
IRQ,,Interrupt ReQuest
IRS,,Internal Revenue Service (US)
IS,,Image Stabilization|Islamic State
ISA,,Industry Standard Architecture|Instruction Set Architecture
ISIL,,Islamic State of Iraq and the Levant
ISIS,,Islamic State of Iraq and Syria
ISO,,The name ISO is taken from the ISO 9660 file system used with CD-ROM media, but what is known as an ISO image might also contain a UDF (ISO/IEC 13346) file system (commonly used by DVDs and Blu-ray Discs).
ISP,,Internet Service Provider
ISRO,,India Space Research Organisation
ISS,,International Space Station
IT,,Information Technology
ITER,,International Thermonuclear Experimental Reactor
IVF,,In Vitro Fertilization
IWC,,International Whaling Commission
JEDEC,,Joint Electron Device Engineering Council
JFC,,Jesus Fucking Christ
JFK,,John F. Kennedy
JIT,,Just In Time (compilation)
JITC,,Just In Time Compilation
JPEG,,A format for compressing image files.
JPG,,A format for compressing image files.
JPL,,Jet Propulsion Labratory (US)
JRE,,Java Runtime Environment
JSON,,A file format designed to hold human- and machine-readable data
K12,,Kindergarten to 12th grade
KB,,Kilobyte|Knowledge Base
KFC,,Kentucky Fried Chicken (US food chain)
KFLOPS,,Kilo FLoating Point OPerations per Second
KGB,,Now the FSB - Komitet Gosudarstvennoi Bezopaznosti (Committee for State Security) Federal Security Service (Russian Federation)
KHZ,KHz,Kilohertz - Thousands of cycles per second
KISS,,Keep It Simple, Stupid
KJV,,King James Version (English language bible)
KMS,,Kilometers|Knowledge Management System
KPH,,Kilometers Per Hour
KS,,Kansas (USA)
KVM,,Keyboard, Video, and Mouse switch
KWH,kWh,kiloWatt-Hour
KW,kW,kiloWatt
KY,,Kentucky (USA)
L1,,Lagrangian point 1 - a point near two large bodies in orbit where a smaller object will maintain its position relative to the large orbiting bodies|Inductor 1
L2,,Lagrangian point 2 - a point near two large bodies in orbit where a smaller object will maintain its position relative to the large orbiting bodies|Inductor 2
L3,,Lagrangian point 3 - a point near two large bodies in orbit where a smaller object will maintain its position relative to the large orbiting bodies|Inductor 3
L4,,Lagrangian point 4 - a point near two large bodies in orbit where a smaller object will maintain its position relative to the large orbiting bodies|Inductor 4
L5,,Lagrangian point 5 - a point near two large bodies in orbit where a smaller object will maintain its position relative to the large orbiting bodies|Inductor 5
LA,,Louisiana (USA)|Los Angeles (California, USA)
LAN,,Local Area Network
LAPD,,Los Angeles Police Department
LASER,,Light Amplification by Stimulated Emission of Radiation
LAX,,Los Angeles, California airport
LC,,Inductor-Capacitor combination
LCD,,Liquid Crystal Display
LDAP,,Lightweight Directory Access Protocol
LDNLS,,Low Dimensional Neural-Like Systems
LDS,,Latter Day Saints (Mormons)
LED,,Light Emitting Diode
LENR,,Low Energy Nuclear Reactor
LEO,,Low Earth Orbit
LF,,Low Frequency: 30-300 KHz
LG,,Life is Good (brand)
LGB,,Lesbian, Gay and Bisexual
LGBT,,Lesbian, Gay, Bisexual and Transexual
LGBTQ,,Lesbian, Gay, Bisexual, Transexual and Questioning
LGBTQQ,,Lesbian, Gay, Bisexual, Transexual, Questioning, Queer
LIFO,,Last In, First Out
LLC,,Limited Liability Corporation
LMAO,,Laughing My Ass Off
LMFAO,,Laughing My Fucking Ass Off
LMGTFY,,Let Me Google That For You
LNA,,Low Noise Amplifier
LNG,,Liquid Natural Gas
LOL,,Laugh Out Loud
LOPG,LOP-G,Lunar Orbital Platform-Gateway
LPF,,Low Pass Filter
LPI,,Lines Per Inch
LR,,Long Range|Lightroom (Adobe product)
LSB,,Lower SideBand (radio)
LSD,,Lysergic Acid Diethylamide - C20H25N3O
LTE,,A mobile communications standard
LUF,,Lowest Usable Frequency
LW,,LongWave (radio)
LWNJ,,Left Wing Nut Job
MAC,,Media Access Control address
MA,,Massachusetts (USA)
MAD,,Mutally Assured Destruction
MAGA,,Make America Great Again
MASER,,Microwave Amplification by Stimulated Emission of Radiation
MAMR,,Microwave-Assisted Magnetic Recording
MB,,Megabyte|Manitoba (Canada)
MBA,,Masters of Business Administration
MC,,Midnight Commander (software)
MD,,Maryland (USA)|Medical Doctor
MDMA,,Ecstasy/Molly: 3,4-methylenedioxy-methamphetamine - C11H15NO2
MDT,,Mountain Daylight Time
ME,,Maine (USA)
MFLOPS,,Million FLoating Point OPerations per Second
MF,,Medium Frequency: 300-3000 KHz
MHZ,MHz,Megahertz - Millions of cycles per second
MI,,Michigan (USA)|Machine Intelligence
MI6,,Secret Intelligence Service (UK, also known as SIS)
MIA,,Missing In Action
MIC,,Miltary Industrial Complex
MIDI,,Musical Instrument Digital Interface
MIPS,,Millions of Instructions Per Second|Microprocessor without Interlocked Pipelined Stages
MIT,,Massachusetts Institute of Technology
ML,,Machine Learning|Machine Language|Major League
MLB,,Major League Baseball
MLK,,Martin Luther King
MM,,2-digit Month, 01-12
MMORPG,,Massively Multiplayer Online Role-Playing Game
MMU,,Memory Management Unit
MN,,Minnesota (USA)
MOAB,,Mother Of All Bombs - a very large fuel-air bomb
MOBA,,Multiplayer Online Battle Arena
MO,,Missouri (USA)
MOS,,Metal Oxide Semiconductor
MPAA,,Motion Picture Association of America
MPEG,,Motion Picture Experts Group
MPH,,Miles Per Hour
MP,,MegaPixel|Member of Parliament
MP3,,Moving Picture Experts Group Layer-3 Audio format
MPU,,Micro Processing Unit
MRO,,Mars Reconnaissance Orbiter
MRSA,,Methicillin-Resistant Staphylococcus Aureus
MS,,Mississippi (USA)|MicroSoft|Multiple Sclerosis
MSFT,,Microsoft (stock ticker symbol)
MSNBC,,MicroSoft National Broadcasting Company
MSM,,MainStream Media
MSRP,,Manufacturer Suggested Retail Price
MST,,Mountain Standard Time
MT,,Montana (USA)|Mountain Time
MTBF,,Mean Time Between Failures
MUF,,Maximum Usable Frequency
MUMPS,,Programming language: Massachusetts General Hospital Utility Multi-Programming System
MW,,Medium Wave (radio)|MegaWatt
NAACP,,National Association for the Advancement of Colored People
NAFTA,,North American Free Trade Agreement
NAS,,Network Attached Storage
NASA,,National Aeronautics and Space Administration (US)
NASD,,National Association of Securities Dealers
NASDAQ,,National Association of Securities Dealers Automated Quotations
NAT,,Network Address Translation
NATO,,North Atlantic Treaty Organization
NBC,,National Broadcasting Company
NB,,New Brunswick (Canada)
NCEI,,National Centers for Environmental Information (NOAA, US)
NCIS,,Naval Criminal Investigative Service (US)
NC,,North Carolina (USA)
NCA,,Non-Compete Agreement
NDA,,Non Disclosure Agreement
ND,,North Dakota (USA)
NE,,Nebraska (USA)|NorthEast
NFC,,Near Field Communication(s)
NFL,,National Football League (US)
NFW,,No Fucking Way
NGO,,Non-Governmental Organization
NHK,,International public broadcasting service of Japan.
NH,,New Hampshire (USA)
NHS,,National Health Service (Britain)
NIA,,National Institute on Aging
NIH,,Not Invented Here|National Institute of Health
NIMBY,,Not In My Back Yard
NIST,,National Institute of Standards and Technology
NJ,,New Jersey (USA)
NK,,North Korea
NL,,Netherlands|New Brunswick (Canada)|New Line
NLP,,Natural Language Processing
NM,,New Mexico (USA)|Never Mind
NN,,Network Neutrality
NNTP,,Network News Transfer Protocol
NOAA,,National Oceanic and Atmospheric Administration (US)
NORAD,,North American Aerospace Defense Command
NOT,,NOT gate: input 1 = output in opposite state
NPC,,Non-Player Character|National People's Congress (China)
NPG,,Negative Population Growth
NPM,,Node Package Manager (Javascript)
NPR,,National Public Radio (US)
NRA,,National Rifle Association (US)
NRCC,,National Republican Congressional Committee (US)
NRO,,National Reconnaisance Office (US)
NSA,,National Security Agency (US)
NSFW,,Not Safe For Work
NS,,Nova Scotia (Canada)
NT,,New Testament
NTS,,Note To Self
NTSC,,National Television System Committee|Never Twice the Same Color
NTSB,,National Transportation Safety Board
NTW,,Not To Worry
NU,,Nunavut (Canada)
NVM,,Non Volatile RAM
NV,,Nevada (USA)
NW,,NorthWest
NWS,,National Weather Service (USA)
NYC,,New York City (New York, USA)
NY,,New York (USA)
NYPD,,New York city Police Department
NYPL,,New York Public Library
NYSE,,New York Stock Exchange
NYT,,New York Times
NZ,,New Zealand|Non-Zero
OA,,Open Access
OC,,Organized Crime|Original Content
OCR,,Optical Character Recognition
OEM,,Original Equipment Manufacturer
OH,,Ohio (USA)
OIG,,Office of the Inspector General (US DOJ)
OK,,Oklahoma (USA)|"Okay"
OJT,,On the Job Training
OLED,,Organic Light Emitting Diode
OM,,Old Man
OMB,,Office of Management and Budget (US)
OMG,,Oh My God
ON,,Ontario (Canada)
OOP,,Object Oriented Programming
OPEC,,Organization of Petroleum Exporting Countries
OPED,Op-Ed,(placed) Opposite of Editorial page: reader commentary
OP,,Original Poster|OPerator
OR,,Oregon (USA)|OR gate: input 1 OR input 2 = output
OS9,,An OS for the 6800 and 6809 microprocessors
OSI,,Open Systems Interconnection
OS,,Operating System|Open-Source (software)
OSX,OS X / MacOS,Operating System X (Apple), AKA MacOS
OT,,Old Testament
OTC,,Over The Counter
OTOH,,On The Other Hand
OTT,,Over The Top (direct distribution of streaming content)
P2P,,Peer to Peer
PAC,,Political Action Committee
PA,,Pennsylvania (USA)
PATRIOT,,uniting and strengthening america by Providing Appropriate Tools Required to Intercept and Obstruct Terrorism
PAYGO,,Pay As You GO
PAL,,Phase Alternate Line video encoding
PBS,,Public Broadcasting Service
PCI,,Payment Card Industry
PC,,Personal Computer; any computer owned by an individual|Politically Correct
PCB,,Printed Circuit Board
PD,,Public Domain, Police Department
PDA,,Personal Digital Assitant|Public Display of Affection
PDF,,Portable Document Format
PDT,,Pacific Daylight Time
PE,,Prince Edward Island (Canada)
PEP,,Python Enhancement Proposal
PFT,,Prints For Time: photographer exchanges prints for model's time
PGP,,Pretty Good Privacy
PHD,Ph.D.,Doctorate of Philosphy
PHEV,,Plug-In Hybrid Electric Vehicle
PHP,,Personal Home Page, now "Hypertext Preprocessor"
PI,,Private Investigator|3.14159265359|Privacy International
PIN,,Personal Identification Number
PITA,,Pain In The Ass
PLL,,Phase Locked Loop
PM,,Prime Minister|Post Meridiem - after midday
PNAS,,Proceedings of the National Academy of Sciences
PNG,,Portable Network Graphics (an image file format and its support community)
POS,,Piece Of Shit
POTUS,,President Of The United States
POV,,Point Of View
PPI,,Pixels Per Inch
PRC,,People's Republic of China
PROM,,Programmable Read-Only Memory - can be user programmed, usually only once
PR,,Pull Request - source code alteration submission|Public Relations|Puerto Rico
PS,,PostScript|Photoshop (Adobe product)|PlayStation
PS2,,PlayStation 2
PS3,,PlayStation 3
PS4,,PlayStation 4
PSA,,Public Service Announcement
PSLV,,Polar Satellite Launch Vehicle
PST,,Pacific Standard Time
PSU,,Power Supply Unit
PSYOPS,,PSYchological OPerationS
PT,,Pacific Time
PTSD,,Post Traumatic Stress Disorder
PV,,PhotoVoltaic
PVC,,PolyVinyl Chloride
Q1,,First Quarter
Q2,,Second Quarter
Q3,,Third Quarter
Q4,,Fourth Quarter
QED,,Quod Erat Demonstrandum: that which was to be demonstrated
QC,,Quebec (Canada)
QLED,,Quantum dot Light Emitting Diode
QOS,QoS,Quality of Service
QR,,Quick Response code
QRZ,,Radio shorthand for are you there?
QSL,,Radio shorthand for response
QSO,,Radio shorthand for conversation
RADAR,,RAdio Detection And Ranging
RAID,,Redundant Array of Independent Disks
RAM,,Random Access Memory - get to any part of the memory at any time
RAW,,Deep color image files, usually from cameras
RBG,,Red Blue Green|Ruth Bader Ginsberg
RC,,Resistor-Capacitor|Radio Control(ed)
RCA,,Radio Corporation of America|an audio / low RF connector
RCMP,,Royal Canadian Mounted Police
RCS,,Revision Control System
RD,R&D,Research and Development
RDS,,Radio Data System|Relational Database Service
RFI,,Radio Frequency Interference
RF,,Radio Frequency, usually short for Radio Frequency signal
RGBA,,Red, Green, Blue, Alpha (transparency)
RGB,,Red, Green, Blue
RH,,Relative Humidity
RI,,Rhode Island (USA)
RIAA,,Recording Industry Association of America
RIP,,Rest In Peace
RISC,,Reduced Instruction Set Comput(ing/er)
RIT,,Receiver Incremental Tuning
RNA,,RiboNucleic Acid: messenger carrying instructions from DNA
RNC,,Repubican National Convention
ROI,,Return On Investment	
ROM,,Read-Only Memory - you can't write new information to this
ROFLMAO,,Rolling On Floor Laughing My Ass Off
ROTFL,,Rolling On The Floor Laughing
ROTFLMAO,,Rolling On The Floor Laughing My Ass Off
ROV,,Remotely Operated Vehicles
RPG,,Role Playing Game|Anti-tank missile (Russian)
RPM,,Revolutions Per Minute
RSA,,Rivest, Shamir, and Adelman (data security company / algorithm)
RSS,,Really Simple Syndication
RST,,Readability, Strength, Tone (radio reception)
RTFA,,Read The Fucking Article
RTFM,,Read The Fucking Manual
RTTY,,Radio Teletype
RV,,Research Vessel|Recreational Vehicle
RWNJ,,Right Wing Nut Job
RX,,Receive
SA,,South Africa|South America
SAAS,,Software As A Service
SAE,,Society of Automotive Engineers
SATA,,Serial Advanced Technology Attachment
SCA,,Subsidiary Communications Authorization
SCOTUS,,Supreme Court Of The United States
SCUBA,,Self-Contained Underwater Breathing Apparatus
SC,,South Carolina (USA)
SDR,,Software Defined Radio
SD,,South Dakota (USA)|Secure Digital
SDK,,Software Development Kit
SE,,SouthEast
SEAL,,Sea Air and Land (US Navy special operations group)
SEC,,Securities and Exchange Commission (US)
SECDEF,,SECretary of DEFense
SEO,,Search Engine Optimization
SETI,,Search for Extra Terrestrial Intelligence
SF,,Science Fiction or less accurately Speculative Fiction|San Francisco (California)
SFWA,,Science Fiction Writers of America
SFW,,Safe For Work
SHF,,Super High Frequency: 3-30 GHz
SIG,,Special Interest Group|Signature
SIM,,Subscriber Identification Module (usually removable card)
SIMM,,Single Inline Memory Module
SIS,,Secret Intelligence Service (UK, also known as MI6)
SJW,,Social Justice Warrior
SK,,Saskatchewan (Canada)|South Korea|Silent Key (deceased)
SLAC,,Stanford Linear Accelerator Center
SLR,,Single Lens Reflex (cameras)
SLS,,Space Launch System
SM,S&M,Sado-Masochism
SMA,,Surface Mount Assembly
SMB,,Server Message Block
SMC,,Surface Mount Component
SMD,,Surface Mount Device
SMH,,Suck Me Hard
SMP,,Surface Mount Package|Symmetric Multi-Process(ing/or)
SMS,,Short Message Service
SMT,,Surface Mount Technology
SN,,Soylent News
SNAFU,,Situation Normal, All Fucked Up
SNAP,,Supplemental Nutrition Assistance Program
SO,,Significant Other
SOB,,Son Of a Bitch
SOC,SoC,System on a Chip
SOG,,Special Operations Group
SOL,,Shit Out of Luck
SOP,,Standard Operating Procedure
SOS,,Save Our Souls|Shit On a Shingle (chipped beef on bread)
SOTA,,State Of The Art
SOTU,,State Of The Union
SP,,Spelling
SPD,,Space Policy Directive
SPID,,Service Profile Identifier
SQL,,Structured Query Language (for databases)
SRLSY,,Seriously
SS,,Secret Service|SteamShip
SSA,,Social Security Administration (US)
SSB,,Single SideBand
SSD,,Solid State Disk
SSH,,Secure SHell
SSID,,Service Set IDentifier
SSL,,Secure Sockets Layer
SSN,,Social Security Number
SSO,,Sun Synchronous Orbit
SST,,SuperSonic Transport|Space Ship Two
SSTV,,Slow Scan TeleVision - images encoded into audio tones, generally sent by radio
STEM,,Science, Technology, Engineering, Math
STL,,Standard Tessellation Language|Special Technologies Laboratory|Salt, Tequila and Lime
STT,,Speech-To-Text
SUV,,Sport Utility Vehicle
SVG,,Scalable Vector Graphics
SW,,Shortwave (radio)|SouthWest|SoftWare
SWAT,,Special Weapons And Tactics 
SWB,,ShortWave Band (radio)
SWL,,ShortWave Listener
SWR,,Standing Wave Ratio
TAM,,Total Addressable Market
TANSTAAFL,,There Ain't No Such Thing As A Free Lunch
TB,,TeraByte|Tuberculosis
TBD,,To Be Determined
TBH,,To Be Honest
TCPA,,Telecom Consumer Protection Act
TDM,,Time Division Multiplexing
TDP,,Thermal Design Power or Point
TERF,,Trans-Exlusionary Radical Feminist
TESS,,Transiting Exoplanet Survey Satellite
TFA,,The Fucking Article: bowdlerized, The Fine Article
TFC,,The Fucking Comments: bowdlerized, The Fine Comments
TFLOPS,,Tera FLoating Point OPerations per Second
TFS,,The Fucking Summary: bowdlerized, The Fine Summary
TF,,The Fuck
TFP,,Time For Prints: model exchanges time for photographer's prints
TFT,,Thin Film Transistor (usually display)
THC,,TetraHydroCannabinol
THF,,Tremendously Frequency: 300 GHz - 3 THz
THOT,,That Hoe Over There
THZ,THz,TeraHertz
TIA,,Thanks In Advance
TIFF,,Tagged Image File Format
TIL,,Today I Learned
TLA,,Three Letter Agency (FBI, CIA, NSA, etc.)
TLDR,TL;DR:,Too Long, Didn't Read
TL,,Too Long
TLD,,Top-Level Domain
TLS,,Transport Layer Security
TM,,TradeMark
TMI,,Too Much Information
TN,,Tennessee (USA)
TNC,,Terminal Node Controller
TOR,,The Onion Router
TOS,,Terms Of Service
TPP,,Trans-Pacific Partnership
TPU,,Tensor Processing Unit
TRS,,Tip Ring Sleeve connector
TSA,,Transportation Security Administration (US)
TSMC,,Taiwan Semiconductor Manufacturing Company
TTL,,Transistor-Transistor Logic|Through The Lens|Time To Live
TTS,,Text-To-Speech
TTYL,,Talk To You Later
TTY,,Teletype
TU,,Terminal Unit
TV,,Television|Transvestite/Tranny
TX,,Texas (USA)|Transmit
UAE,,United Arab Emirates
UAV,,Unmanned Aerial Vehicle
UCSD,,University of California, San Diego
UC,,University of California
UCLA,,University of California, Los Angeles
UDP,,User Datagram Protocol
UEFI,,Unified Extensible Firmware Interface
UFO,,Unidentified Flying Object
UHF,,Ultra High Frequency: 300 MHz - 3 GHz
UI,,User Interface
UK,,United Kingdom
UL,,Underwriter's Labratories
ULA,,United Launch Alliance
UML,,Unified Modeling Language
UNFCCC,,United Nations Framework Convention on Climate Change
UNESCO,,United Nations Educational, Scientific and Cultural Organization
UN,,United Nations
UNICEF,,United Nations International Children's Emergency Fund
UPI,,United Press International
UPS,,Uninterruptible Power Supply|United Parcel Service
URI,,Uniform Resource Identifier
URL,,Uniform Resource Locator
USAF,,United States Air Force
USA,,United States of America|United States Army
USB2,,Universal Serial Bus v2
USB3,,Universal Serial Bus v3
USB,,Universal Serial Bus|Upper SideBand (radio)
USBC,USB-C,Universal Serial Bus, type C
USD,,United States Dollars (currency)
USDA,,United States Department of Agriculture
USG,,United States Government
USMC,,United States Marine Corps
USMCA,,United States-Mexico-Canada Agreement
USN,,United States Navy
USPS,,United States Postal Service
USS,,United States Ship
USSR,,United Soviet Socialist Republics
US,,United States (of America)
UTC,,Universal Coordinated Time
UT,,Utah (USA)
VA,,Virgina (USA)|Veteran's Administration (US)
VC,,Venture Capital/Capitalist|Version Control
VEC,,Volunteer Exam Coordinator
VESA,,Video Electronics Standards Association
VFO,,Variable Frequency Oscillator
VHF,,Very High Frequency: 30-300 MHz
VIN,,Vehicle Identification Number
VIP,,Very Important Person
VLAN,,Virtual Local Area Network
VLF,,Very Low Frequency: 3-30 KHz
VLSI,,Very Large Scale Integrated circuit
VM,,Virtual Memory|Virtual Machine
VOA,,Voice Of America (broadcast entity)
VOD,,Video On Demand
VOIP,VoIP,Voice over IP
VOX,,Activate transmitter on voice detection
VP,,Vice President
VPN,,Virtual Private Network
VR,,Virtual Reality
VRAM,,Video Ram
VT,,Vermont (USA)
VW,,VolksWagon
WAN,,Wide Area Network
WASP,,White Anglo Saxon Protestant
WA,,Washington (USA)
WAC,,Worked All Countries (amatuer radio)
WAS,,Worked All States (amateur radio)
WAZ,,Worked All Zones (amateur radio)
WBC,,White Blood Count
WC,,Water Closet (bathroom)|Waist Circumference
WEC,,Wave Energy Converter
WFM,,Wide FM (generally 200 KHz wide broadcast format)
WH,,White House (US)
WHO,,World Health Organization
WIFI,Wi-Fi,WLAN based on any of the 802.11 standards
WI,,Wisonsin (USA)
WIC,,Women, Infants and Children
WIP,,Work In Progress
WLAN,,Wireless Local Area Network
WMD,,Weapons of Mass Destruction
WNEW,,Prog rock FM station in NYC in the 1900's
WRT,,With Regard To
WSJ,,Wall Street Journal (US newspaper)
WSPR,,Weak Signal Propagation Reporter
WSU,,Washington State University
WTC,,World Trade Center
WTF,,What The Fuck
WTH,,What The Hell
WTO,,World Trade Organization
WV,,West Virginia (USA)
WW1,,World War One
WW2,,World War Two
WW3,,World War Three
WWI,,World War One
WWII,,World War Two
WWIII,,World War Three
WWW,,World Wide Web (or just, "the Web")
WX,,Weather
WY,,Wyoming (USA)
WYSIWYG,,What You See Is What You Get
XL,,eXtra Large
XML,,eXtensible Markup Language
XMPP,,Extensible Messaging and Presence Protocol
XMS,,Extended Memory Specification
XOR,,XOR gate: input 1 not equal input 2 = output
XTAL,,Crystal
XX,,Female chromosomes
XY,,Male chromosomes
XYL,,Ex Young Lady
XXL,,eXtra eXtra Large
XXXL,,eXtra eXtra eXtra Large
YL,,Young Lady
YMMV,,Your Milage May Vary
YOLO,,You Only Live Once
YT,,Yukon Territory (Canada)
YY,,last 2-digits year
YYYY,,4-digit Year