TLA

AAC (Advanced Audio Coding)
AAM (automatic acoustic management)
AAS (as a service or Auto Area Segmentation)
ABC (Atanasoff-Berry Computer)
ABN (absolute domain name)
ABP (AdBlock Plus)
ACC (accelerate, acceleration, accept, acceptance, accompanied, accompaniment, accompany, account, accuracy, or actually)
ACD (audio conversion device)
ACE (access control entry or assured computing environment)
ACK (acknowledgment)
ACL (access control list)
ACM (Association for Computing Machinery)
ACR (absolute cell reference, attenuation crosstalk ratio, actual cell rate, or annual compliance report)
ACS (access control system)

A-D (analog-to-digital)
ADB (Android Debug Bridge or Apple Desktop Bus)
ADC (analog-to-digital converter)
ADL (Anti-Defamation League)
ADO (ActiveX Data Object)
ADR (address)
ADS (aim down sights)
AES (Advanced Encryption Standard)
AFK (away from keyboard)
AFS (Andrew File System)
AGI (artificial general intelligence)
AGP (accelerated graphics port)
AIK (Automated Installation Kit)
AIM (AOL Instant Messenger or Apple, IBM, and Motorola)
AIO (All-in-One)
AIX (advanced interactive executive)
AKA (also known as)
ALM (application lifecycle management)
ALU (arithmetic logic unit)
AMA (ask me anything)
AMI (American Megatrends Inc.)
Amp (ampere)
AMR (audio/modem riser)
ANC (active noise cancellation)
ANI (Automatic Number Identification)
ANN (Artificial Neural Network)
AoD (area of damage)
AoE (Age of Empires or area of effect)
AOL (America Online)
AOP (aspect-oriented programming or auto operator)
API (application programming interface)
APK (Android Package File)
APM (advanced power management or actions per minute)
App (application)
APT (advanced packaging tool or advanced persistent threat)
APU (accelerated processing unit or advanced processing unit)
AQI (air quality index)
ARC (Advanced RISC Computing or Audio Return Channel)
ARG (argument, alternate reality games, or augmented reality games)
ARM (Advanced RISC Machine)
ARP (Address Resolution Protocol)
ARQ (automatic repeat request)
ASF (Advanced Systems Format)
ASF (Apache Software Foundation)
ASL (age, sex, and location)
ASM (assembly)
ASN (autonomous system number)
ASP (Active Server Pages, AppleTalk session protocol, application service provider, authorized service provider, or answer set programming)
ASR (automated system recovery, automatic speech recognition, or automatic send and receive)
ATA (Advanced Technology Attachment)
ATC (advanced transfer cache)
ATF (above the fold)
ATM (asynchronous transfer mode, at the moment, or automated teller machine)
ATS (Applied Type System)
ATS (automatic transfer switch)
ATX (advanced technology extended)
AUI (Attachment Unit Interface)
AUP (acceptable use policy)
AVC (Advanced Video Coding)
AVI (Audio Video Interleave)
AVR (automatic voltage regulator, automatic voice recognition, or automatic voice response)
AVS (antivirus software)
AWG (American Wire Gauge)
AWS (Amazon Web Services)

BAE (before anyone else)
BAT (Baby AT)
BBM (BlackBerry Messenger)
BBS (BIOS boot specification, bulletin board system, or be back shortly)
BCC (blind carbon copy)
BCD (binary-coded decimal or boot configuration data)
BCP (Best Current Practices)
BCR (barcode reader)
BDC (backup domain controller, Bluetooth daughter card, big dot com, or big dumb company)
BDF (Glyph Bitmap Distribution Format)
BDI (bidirectional isolation)
BDO (bidirectional override)
BER (bit error rate or beyond economical repair)
BES (BlackBerry Enterprise Server)
BFF (best friends forever)
BGA (ball grid array)
BGP (Border Gateway Protocol)
BGR (blue, green, and red)
BHO (Browser Helper Object)
Bin (binary)
BIO (biography)
Bit (binary digit)
BIU (bold, italic, underline)
BLE (Bluetooth low energy)
BMP (bitmap)
BNC (bouncer, Bayonet Neill-Concelman, Bayonet Nut Connector, or British Naval/Navy Connector)
BOE (bind on equip)
BOM (byte order mark, bill of materials, beginning of message, or beginning of medium)
BOP (bind on pickup)
BPB (BIOS pattern block)
BPL (broadband-over-powerline)
BPM (business process management)
bps (bits per second)
Bps (bytes per second)
BRB (be right back)
BRI (basic rate interface)
BSB (back-side bus)
BSC (Binary Synchronous Communications)
BSD (Berkeley Software Distribution)
BSP (binary space partitioning)
BSS (basic service set)
BTC (bitcoin or Behavior Tech Computers)
BTW (by the way)
BTX (balanced technology extended)

Cab (Cabinet file)
CAD (computer-aided design)
CAP (Competitive Access Provider)
CAS (column address select or column access strobe)
CAT (Central Africa Time)
CAV (constant angular velocity)
CBE (computer-based education)
CBI (computer-based instruction)
CBL (calculator based labs, comptuer-based learning)
CBT (computer-based training)
CCC (Catalyst Control Center)
CCD (charge-coupled device)
CCS (call-control signaling or common command set)
CCW (counterclockwise)
CDA (Communication Decency Act or compact audio disc)
CDC (communications daughter card or Cult of the Dead Cow)
CDE (Common Desktop Environment)
CDG (CDMA Development Group)
CDN (content delivery network or content distribution network)
CDP (Cache Discovery Protocol, Certificate in Data Processing, Columbia Data Products, content delivery platform, content discovery platform, or continuous data protection)
CEH (certified ethical hacker)
CEO (chief executive officer)
CES (Consumer Electronics Show)
CFO (chief financial officer)
CGA (color graphics adapter)
CGI (common gateway interface or computer-generated imagery)
CHS (cylinder-head-sector)
CIL (common intermediate language)
CIM (common information model)
CIO (chief information officer)
CIR (committed information rate)
CLI (command-line interface, command-line interpreter, Common Language Infrastructure, or caller line identification)
CLR (common language runtime or clear)
CLS (clear screen or Cumulative Layout Shift)
CLV (constant linear velocity)
CMA (Computer Misuse Act)
CMC (computer-mediated communication)
CMS (content management system)
CNE (Certified Novell Engineer)
CNR (communication and network riser)
COA (certificate of authenticity)
COB (close of business, chip on board)
COD (Call of Duty, cash on delivery, click of death)
COM (Component Object Model or Computer Output Microfilm)
Con (console, confidence, or conference)
COO (chief operating officer)
CPA (cost per action or cost per acquisition)
CPC (cost per click)
CPI (characters per inch)
CPL (Combined Programming Language)
CPM (characters per minute, cost per thousand, or cost per mile)
CPS (characters per second)
CPU (central processing unit)
CRB (come right back)
CRC (cyclic redundancy check)
CRL (Certificate Revocation List)
CRM (customer relationship management)
CRT (cathode ray tube)
CSE (custom search engine)
CSS (cascading style sheets, Content Scramble System, or chirp spread spectrum)
CST (Computer Service Technician or Central Standard Time)
CSV (comma-separated values)
CTA (call to action)
CTC (care to chat)
CTD (crash to desktop)
CTF (capture the flag)
CTO (technology officer or chief technical officer)
CTR (click-through rate)
CTS (clear to send or carpal tunnel syndrome)
CUI (character user interface or command-line user interface)
CUT (Coordinated Universal Time)
CVC (Card Verification Code)
CVE (Common Vulnerabilities and Exposures)
CVS (computer vision syndrome or Concurrent Version System)
CVV (Card Verification Value)
CWD (current working directory)

DAC (digital-to-analog converter or discretionary access control)
DAE (digital audio extraction, does anyone else)
DAO (decentralized autonomous organizations)
DAP (digital audio player)
DAS (direct access storage)
DAT (Digital Audio Tape)
DAU (daily active users)
DAW (digital audio workstation)
DBA (database administrator, database analyst, decibels adjust, or doing business as)
DCC (digital content creation, direct client-to-client, direct cable connection, or digital compact cassette)
DCE (data circuit-terminating equipment, data communication equipment, Desktop Composting Engine, or distributed computing environment)
DDE (Dynamic Data Exchange)
DDF (disease and drug-free)
DDG (DuckDuckGo)
DDK (driver development kit)
DDL (data definition language or drop-down list)
DDO (disk drive overlay, dynamic drive overlay, or Dungeons & Dragons Online)
DDP (Datagram Delivery Protocol)
DDR (double data rate, dial-on-demand routing, or Dance Dance Revolution)
DDR SDRAM (double data rate synchronous dynamic random-access memory)
DDS (Digital Data Storage)
DEA (Data Encryption Algorithm)
DEC (Decimal or Digital Equipment Corporation)
DES (Data Encryption Standard)
DFD (data flow diagram)
DHA (directory harvest attack)
DHS (Department of Homeland Security)
DID (direct inward dialing)
DIF (Directory Interchange Format)
DIP (dual in-line package)
DIX (Digitial, Intel, and Xerox)
D/L (download)
DLA (drive letter access)
DLC (Data Link Control, digital loop carrier, or downloadable content)
DLL (dynamic-link library)
DLP (data loss prevention, data level parallelism, discrete logarithm problem, or Digital Light Processing)
DLT (digital linear tape or distributed ledger technology)
DMA (direct memory access)
DMF (distribution media format)
DMI (desktop management interface)
DML (data manipulation language)
DMZ (demilitarized zone)
DND (Dungeons and Dragons)
DNS (domain name system)
DOA (dead on arrival)
DOD (Department of Defense or drop-on-demand)
DOM (document object model)
DOS (denial of service or disk operating system)
DoT (damage over time)
DPI (dots per inch)
DPS (damage per second)
DRM (digital rights management, device relationship management, or Direct Rendering Manager)
DRO (digital readout)
DRQ (data request)
DSA (Digital Signature Algorithm)
DSL (digital subscriber line, domain-specific language, or Damn Small Linux)
DSN (Data Source Name or deep space network)
DSO (data source object)
DSP (digital service provider, digital signal processor, digital signal processing, or drive secondary present)
DSR (Dynamic Source Routing or Dell System Restore)
DSS (Digital Satellite Service or Digital Signature Standard)
DST (daylight saving time)
DTD (document type definition)
DTE (data terminal equipment or data terminating equipment)
DTP (desktop publishing program)
DTR (data terminal ready)
DTS (digital thermal sensor, Digital Theater Sound, or data transformation services)
DTX (discontinuous transmission)
DUN (dial-up networking)
DUT (device under test)
DVD (digital versatile disc or digital video disc)
DVI (digital visual interface)
DVR (digital video recorder)
DWM (desktop window manager)
DXi (DirectX Instrument)

EAI (enterprise application integration)
EAP (Extensible Authentication Protocol)
EAT (expertise, authoritativeness, and trust)
ECC (error-correcting code)
ECL (Enterprise Control Language)
ECP (extended capabilities port)
ECU (Electronic Control Unit)
EDA (electronic design automation)
EDC (Ethernet daughter card)
EDI (electronic data interchange)
EDO (extended data out)
EDP (electronic data processing)
EFF (Electronic Frontier Foundation)
EFI (Extensible Firmware Interface)
EFS (Encrypting File System)
EGA (enhanced graphics adapter)
EHR (Electronic Health Record)
EIA (Electronic Industries Alliance)
EiB (exbibyte)
ELD (electroluminescent display)
ELF (extremely low frequency)
EMF (electromotive force or enhanced metafile)
EMI (electromagnetic interference)
EMM (expanded-memory manager)
EMR (electromagnetic radiation or electronic medical record)
EMS (emergency management services or expanded memory specification)
EMZ (Windows enhanced metafile)
ENQ (enquiry character)
EOD (end of day or end of discussion)
EOF (end-of-file)
EOL (end-of-life or end-of-line)
EOM (end-of-message)
EOP (end-of-page)
EOS (end-of-support)
EOT (End-of-Transmission or end of topic)
EOW (end of week)
EPA (Environmental Protection Agency)
EPD (electronic paper display)
EPP (enhanced parallel port)
EPS (encapsulated PostScript)
ERD (Emergency Repair Disk or entity relationship diagram)
ERE (extended regular expressions)
ERP (enterprise resource planning or erotic role play)
ESA (Entertainment Software Association)
ESD (electrostatic discharge, electronic software download, electronic software distribution, or electronic software delivery)
ESI (enhanced serial interface)
ESP (e-mail server provider)
ESX (Elastic Sky X)
ETA (estimated time of arrival or Electronic Technicians Association)
ETX (End-of-Text)
EVD (enhanced versatile disc)
EVP (enhanced virus protection)
EXE (executable)

FAC (feature access code)
FAD (functioning as designed)
FAQ (frequently asked questions)
FAT (file allocation table)
FAU (file allocation unit)
Fav (favorite)
FBX (FilmBox)
FCB (File Control Block)
FCC (Federal Communications Commission)
FDC (floppy-disk controller)
FDD (floppy disk drive)
FDL (Firebase Dynamic Links)
FDX (Full duplex)
FEC (forward error correction)
FEM (finite element method)
FEP (front-end processor)
FFA (free for all)
FFI (foreign function interface)
FFS (For F***'s Sake, freefall sensor)
FHD (Full High Definition)
FHS (Filesystem Hierarchy Standard)
FIF (fractal image format)
FLV (Flash video)
FML (f*** my life)
FMV (full-motion video)
FNR (format and restore)
FOS (father over shoulder)
FPC (Free Pascal compiler)
FPD (flat-panel display)
FPM (fast page mode)
FPS (frames per second or first-person shooter)
FPU (floating-point unit)
FPV (first-person view)
FRU (field-replaceable unit)
FSB (front-side bus)
FSF (Free Software Foundation)
FSK (frequency-shift keying)
FSM (female seeking male)
FSM (finite-state machines or finite automata)
FSO (free-space optical communication)
FSP (File Sharing Protocol)
FTC (Federal Trade Commission)

FTP (file transfer protocol)
FUD (fear, uncertainty, and doubt)
FWH (firmware hub)
FYI (for your information)

GAM (Google Ad Manager)
GBd (gigabaud)
GCC (GNU Compiler Collection)
GCD (global cooldown)
GCP (Google Cloud Platform)
GCR (group code recording)
GDI (Graphics Device Interface)
GEM (Graphics Environment Manager)
GFG (good freaking game)
GFM (GitHub Flavored Markdown)
GFS (Global File System or Google File System)
GFU (good for you)
GFX (graphics)
GHz (Gigahertz)
GiB (gibibit or gibibyte)
GIF (graphics interchange format)
GIS (geographic information system)
GKS (Graphical Kernel System)
GND (ground)
GNU (GNU's Not Unix)
GPF (general protection fault)
GPG (GNU Privacy Guard)
GPL (GNU General Public License)
GPO (Group Policy Object)
GPS (Global Positioning System or General Problem Solver)
GPT (GUID partition table or Generative Pre-trained Transformer)
GPU (graphics processing unit)
GRC (governance, risk and compliance or Gibson Research Corporation)
GSM (Global System for Mobile communication)
GSX (Ground Storm X)
GTA (Grand Theft Auto)
GTG (got to go)
GTK (GIMP toolkit)
GTM (Google Tag Manager)
GTR (got to run)
GUI (graphical user interface)
GvR (Guido van Robot)
GWC (Girls Who Code)

HAK (hugs and kisses)
HAL (hardware abstraction layer)
HAN (home area network)
HBA (host bus adapter)
HCD (Host Controller Driver)
HCI (human computer interface)
HCL (hardware compatibility list or HashiCorp Configuration Language)
HCM (human capital management)
HDC (hard disk controller)
HDD (hard disk drive)
HDR (high dynamic range)
HDX (half duplex)
HES (hypertext editing system)
Hex (hexadecimal)
HFC (hybrid fiber coax)
HFS (hierarchical file system)
HGA (Hercules Graphics Adapter)
HGC (Hercules Graphics Card)
HHD (hybrid hard drive)
HID (human interface device)
HIT (human intelligence task)
HLL (high-level language)
HLS (hue, lightness, saturation)
HMA (high-memory area)
HMU (hit me up)
HOP (half operator)
HoT (Heal over Time)
HPA (high-performance addressing or hidden protected area)
HPC (handheld PC)
HPD (hybrid passive display)
HPE (Hewlett Packard Enterprise)
HRU (how are you)
HSB (hue, saturation, and brightness)
HSF (heat sink and fan)
HSI (hue, saturation, and intensity)
HSL (hue, saturation, and lightness)
HSV (hue, saturation, and value)
HTH (hope that helps)
HUD (heads-up display)
Huh (Have you heard)

IAB (Internet Activities Board)
IAC (In Any Case or Interapplication communications)
IAD (integrated access device)
IAP (Internet access provider)
IBG (interblock gap)
ICA (independent computing architecture, or integrated communications adapter)
ICC (International Color Consortium)
ICH (I/O controller hub)
ICO (icon or Initial Coin Offering)
ICS (Internet Connection Sharing)
ICT (information and communications technology or International Computers and Tabulators)
ICU (instruction cache unit, interface converter unit, ISA configuration utility, or interactive chart utility)
IDC (insulation displacement contact or insulation displacement connector)
IDE (integrated development environment, integrated drive electronics, or integrated desktop environment)
IDS (intrusion detection system)
IEC (International Electrotechnical Commission)
IEN (Internet Experiment Note, Internet Engineering Notes, or Image-Enabled Netware)
IGP (Interior Gateway Protocol, Interior routing protocol, or integrated graphics processor)
IHA (Intel Hub Architecture)
IIC (Inter-Integrated Circuit)
IID (Internet identity)
IIL (integrated injection logic)
IIS (Internet Information Server)
IKR (I know right)
ILP (instruction level parallelism)
IMO (in my opinion)
INC (incorporated, or incoming)
Int (integer)
I/O (input/output)
IOC (input/output controller)
IoE (Internet of Everything)
IOS (Input/Output Supervisor or Internetworking operating system)
IoT (Internet of Things)
IPB (illustrated parts breakdown)
IPC (interprocess communication, instructions per cycle)
IPD (interpupillary distance)
IPF (invalid page fault)
IPL (initial program load or Information Processing Language)
IPP (Internet presence provider)
IPS (in-plane switching or intrusion prevention system)
IPX (Internetwork Packet Exchange)
IRC (Internet Relay Chat)
IRG (interrecord gap)
IRL (in real-life)
IRQ (interrupt request)
ISA (Industry Standard Architecture or instruction set architecture)
ISC (Internet Systems Consortium)
ISI (Information Sciences Institute or Instruction Storage Interrupt)
ISO (International Organization for Standardization)
ISP (Internet service provider)
ISR (interrupt service routine)
ISV (independent software vendor)
ITC (International Typeface Corporation)
ITQ (information technology qualification)
ITU (International Telecommunication Union)
ITX (information technology extended)

JAR (Java archive)
JCL (job control language)
JDK (Java Development Kit)
JFS (journaling file system)
JIL (Java Intermediate Language or Joint Innovation Lab)
JIT (just-in-time)
JNI (Java Native Interface)
JPG (JPEG)
JRE (Java Runtime Environment)
JSP (JavaServer Pages)
JSR (jump to subroutine)
JTF (job file table)
JVM (Java virtual machine)
JXA (JavaScript for Automation)

kBd (kilobaud)
KDE (K Desktop Environment)
kHz (kilohertz)
KiB (kibibyte)
Kib (kibibit)
KIT (keep in touch)
KOS (kill on sight)
KPC (keep parents clueless)
KRR (knowledge representation and reasoning)
KSR (keyboard send and receive)
KVM (keyboard, video, and mouse or Kernel-based Virtual Machine)

LAN (local area network)
LBA (large block addressing)
LBS (location-based service)
LCC (leadless chip carrier)
LCD (liquid-crystal display)
LDT (Lightning Data Transfer)
LED (light-emitting diode)
LFD (Login Failure Daemon)
LFG (looking for group)
LFM (looking for more)
LFN (long file name)
LGA (land grid array)
LIF (low insertion force)
LLC (limited liability company or Logical Link Control)
LLM (large language model or logic learning machine)
LMK (let me know)
LMS (Learning Management System)
LNP (local number portability)
LOD (level of detail)
LOF (loss of frame)
LOL (laugh out loud, League of Legends, lots of love, or lots of luck)
LOS (Line of Sight or Loss of signal)
LPB (low ping b*^$#)
LPD (line printer daemon)
LPI (lines per inch or low probability of interception)
LPM (lines per minute)
LPS (Library Programs Service)
LPT (line printer terminal)
LPX (lean packet exchange or low profile extension)
LRC (longitudinal redundancy check)
LRU (line replaceable unit or least recently used)
LSB (least significant bit or Linux Standard Base)
LSC (least significant character)
LSD (least significant digit)
LSG (live service game)
LSI (large-scale integration)
LSP (Layered Service Provider or link state packet)
LTE (Long-Term Evolution)
LUT (lookup table)
LVL (level)

MAC (media access control or Macintosh)
MAE (Metropolitan Area Ethernet)
mAH (milliamp hour)
MAN (manual or metropolitan area network)
MAR (memory address register)
MAU (media access unit or monthly active users)
Max (maximize or maximum)
MBd (megabaud)
MBL (microcomputer-based labs)
MBP (MacBook Pro)
MBR (master boot record)
MCA (Micro Channel Architecture)
MCF (Multimedia Container Format)
MCT (Microsoft Certified Trainer)
MDA (monochrome display adapter)
MDC (mobile daughter card or modification detection code)
MDF (main distribution frame)
MDG (Mobility Development Group)
MDI (multiple-document interface)
MFA (multi-factor authentication)
MFM (modified frequency modulation)
MFP (multifunction printer)
MFT (Master File Table)
MHz (megahertz)
MIA (missing in action)
Mib (mebibit)
MiB (mebibyte)
MIB (management information base)
MIC (Microphone, Microfloppy Industry Committee, or Message Integrity Check)
Mid (MIDI file extension, middle)
Min (minimum)
MIN (mobile identification number)
MIP (Math Input Panel)
MIR (mail in rebate)
MIS (management information system)
MIT (Massachusetts Institute of Technology)
MKE (Matsushita Kotobuki Electronics)
MKV (Matroska Multimedia Container)
MLG (Major League Gaming)
MMC (MultiMediaCard or Microsoft Management Console)
MMI (man machine interface)
MMO (massively-multiplayer online)
MMS (Multimedia Message Service)
MMU (memory management unit)
MMX (MultiMedia eXtension)
MNO (mobile network operator)
MNP (Microcom Network Protocol)
Mod (modulo)
MOS (metal-oxide-semiconductor)
MOV (Metal Oxide Varistor)
MPA (Motion Picture Association)
MPC (Multimedia Personal Computer)
MPI (message passing interface)
MPP (massively parallel processing)
MRP (Materials Requirement Planning)
MRU (Maximum Receive Unit)
MSB (most significant bit or most significant byte)
MSC (mass storage class, mobile switching center, message sequence chart, most significant character, multiple systems coupling, or mass storage control)
MSD (Microsoft Diagnostics or most significant digit)
MSE (Microsoft Security Essentials)
MSF (male seeking female)
MSI (medium-scale integration, Micro-Star International, Microsoft Installer)
MSN (Microsoft Network)
MSP (Management Service Provider)
MTA (mail transfer agent or message transfer agent)
MTU (maximum transmission unit)
MTX (microtransaction)
MUD (multi-user dungeon)
MUI (multi-user interface)
MUT (Mauritius Time or MultiUser Talk)
MVP (most valuable player)
MVP (Most Valuable Professional)
MVS (multiple virtual storage)

NAK (negative acknowledgment)
NaN (not a number)
NAP (network access protection)
NAS (network access server or network-attached storage)
NAT (network address translation)
NBD (no big deal)
NBT (NetBIOS over TCP/IP)
NCP (NetWare Core Protocol or network control protocol)
NDA (non-disclosure agreement)
NDR (non-destructive readout, network data representation, Norddeutscher Rundfunk, or non-active, dormant, to be removed)
NDS (NetWare Directory Services)
NEC (Nippon Electronics Company or National Electrical Code)
NEM (New Economic Movement)
NEQ (not equal to)
NER (named-entity recognition)
Net (network)
NFC (near-field communication)
NFR (not for resale)
NFS (network file system)
NFT (non-fungible token)
NGL (not gonna lie)
NIC (network interface card)
NII (National Information Infrastructure)
NIM (No Internal Message)
NIP (non-impact printer)
NIT (Network Information Table or Network Interface Tap)
NLE (non-linear editing or non-linear video editing)
NLP (natural language processing)
NLQ (near letter-quality)
NLS (online system)
NLX (new low profile extended)
NMI (non-maskable interrupt)
NMS (network management software)
NOR (Not-Or)
NOS (network operating system)
NPC (non-player character, non-playable character, non-printing character, or NP-Complete)
NPP (Notepad ++ and NVIDIA Performance Primitives)
NPU (neural processing unit)
NRN (no response necessary)
NRT (non-real time)
NRZ (non-return-to-zero)
NSA (National Security Agency)
NSP (Name Server Protocol, network service provider, or news service provider)
NTN (network terminal number)
NTP (Network Time Protocol)
NUC (Next Unit of Computing)
Num (number)
NVM (never mind or non-volatile memory)

OBJ (object)
OBS (Open Broadcaster Software)
OCR (optical character recognition or optical character reader)
Oct (Octal)
ODG (OpenDocument Graphic)
ODI (open data-link interface)
ODP (OverDrive Processor)
OEM (original equipment manufacturer)
OID (object identifier)
OIN (Open Invention Network)
OIS (Optical Image Stabilization)
OLE (Object Linking and Embedding or OnLine English)
OMR (optical mark reading)
OMW (on my way)
OOC (out-of-character)
OOF (out of the office)
OOM (out of mana)
OOO (out of the office)
OOP (object-oriented programming)
OPS (operations per second)
OSC (Open Sound Control)
OSD (on-screen display, object-based storage device, or open source definition)
OSF (Open Software Foundation)
OSI (Open Systems Interconnection or Open-Source Initiative)
OSK (on-screen keyboard)
OSP (online service provider)
OSR (OEM service release)
OSS (open-source software or operations support systems)
OTG (On-The-Go, off the grid, or oh, thank God)
OTL (Office of Technology Licensing)
OTP (on the phone, one-time password, or one-time programmable)
OTS (over-the-shoulder)
OTW (on the way)
OUI (Organizationally Unique Identifier)
OVP (online video platform)
OVR (overtype mode)
OWC (optical wireless communication or Office Web Components)

PAC (proxy auto config or PCI/AGP Controller)
PAD (packet assembler/disassembler or Power Automate Desktop)
PAE (Physical Address Extension)
PAL (Phase Alternating Line or parents are listening)
PAN (personal area network)
PAT (port address translation)
PAW (parents are watching)
PBX (private branch extension or private branch exchange)
PCB (printed circuit board)
PCI (peripheral component interconnect)
PCL (Printer Command Language)
PCM (pulse-code modulation)
PCS (personal communications service)
PDA (personal digital assistant)
PDC (primary domain controller)
PDF (Portable Document Format or Package Definition File)
PDL (page description language)
PDP (Programmed Data Processor)
PDU (protocol data unit)
PEL (picture element)
PEP (Packet Ensemble Protocol)
PET (Personal Electronic Transactor)
PFP (profile picture)
PGA (pin grid array, Professional Graphics Adapter, or Professional Golf Association)
PGP (pretty good privacy)
PHP (PHP: Hypertext Preprocessor)
PiB (pebibyte)
PIC (picture or programmable interrupt controller)
PID (process identifier or product identification)
PIF (program information file)
PII (Pentium 2 or personally identifiable information)
PIM (personal information management or Protocol Independent Multicast)
PIN (personal identification number)
PIO (programmed input/output)
PIR (parent in room)
PIT (programmable interval timer)
PKI (Public Key Infrastructure)
PLA (polylactic acid)
PLS (please)
PLT (programming language team)
PLZ (please)
PMF (polarization maintaining fiber)
PMS (Pantone Matching System)
PNG (portable network graphics)
PnP (plug and play or party and play)
POD (plain old documentation or print on demand)
PoE (point of entry or Power over Ethernet)
POP (post office protocol or point of presence)
PoS (Proof-of-Stake)
POS (packet over SONET, parent over shoulder, piece of s#!^, or point-of-sale)
POV (point of view)
PoW (Proof-of-Work)
PPC (pay per click, Pocket PC, Peercoin, or PowerPC)
PPH (pages per hour)
PPI (pixels per inch)
PPM (pages per minute or Perl package manager)
PPP (point-to-point protocol)
PPS (privacy policy statement)
PPT (PowerPoint)
PRN (printer)
PSB (Photoshop Big or Photoshop Large Document Format)
PSD (Photoshop document)
PSE (Photoshop Elements)
PSK (pre-shared key)
PSP (PlayStation Portable, Python Server Pages, Paint Shop Pro)
PSR (Problem Steps Recorder)
PST (Pacific Standard Time, please send tell, Personal Store)
PSU (power supply unit)
PSX (PlayStation)
PTM (pseudo-terminal master)
PTR (Public Test Realm)
PTS (pseudoterminal slave)
PTY (pseudoterminal)
PTZ (pan-tilt-zoom)
PUG (pickup group)
PvE (player vs. environment)
PvP (player vs. player)
PVR (personal video recorder)
PWA (progressive web application)
PWD (print working directory or password)
PWS (Personal Web Server)
PXE (preboot execution environment)
PXI (PCI extensions for instrumentation)

QAM (quadrature amplitude modulation)
QAT (Quick Access Toolbar)
QBE (query by example)
QDR (quad data rate)
QHD (Quad High Definition)
QIC (quarter-inch cartridge)
QML (Qt Modeling Language)
QnA (questions and answers)
QoS (quality of service)
QPB (quad pumped bus)
QPI (quickpath interconnect)

RAD (rapid application development)
RAM (random-access memory)
RAP (Route Access Protocol)
RAR (Roshal ARchive)
RAS (remote access server, Remote Access Service, row address select, or row access strobe)
RAT (Remote Access Trojan)
RBL (real-time blackhole list)
RCE (Remote Code Execution, Reverse Code Engineering, or Regional Coding Enhancement)
RCL (recall)
RCS (revision control system)
RCW (runtime callable wrapper)
RDF (Resource Description Framework)
RDM (random deathmatch)
RDP (Remote Desktop Protocol)
REC (receive, record, or recording)
Rel (release)
REM (remark)
RFC (Request for Comments)
RFI (radio-frequency interference, request for information)
RFP (request for proposal)
RGB (red, green, and blue)
RIP (raster image processor, raster image process, or Routing Information Protocol)
RLE (run-length encoding)
RLL encoding (run-length limited encoding)
RLP (resource location protocol)
RMA (return materials authorization)
RMB (right mouse button)
RMS (root mean square)
RMT (real money trade)
ROM (read-only memory)
ROM BIOS (read-only memory basic input/output system)
RPC (remote procedure call)
RPG (role-playing game, report program generator, or raster pattern generator)
RPM (revolutions per minute, Red Hat Package Manager, or RPM Package Manager)
RRD (removable rigid disk)
RSA (Rivest, Shamir, Adelman)
RSI (repetitive strain injury)
RSL (Rambus signaling level)
RSS (Really Simple Syndication, or Relay Spam Stopper)
RTC (real-time clock)
RTF (rich text format)
RTM (release to manufacturing)
RTO (return to office)
RTP (Real-time Transport Protocol)
RTR (RARE technical report)
RTS (real-time strategy or request to send)
RTW (release to web)
RUT (are you there?)
RVR (realm vs. realm)
RWD (responsive web design)
RxD (received data)

SAN (storage area network)
SAP (Service Advertising Protocol, Session Announcement Protocol, Systems Applications and Products, or System Analysis and Program)
SAS (Serial Attached SCSI or Standalone Server)
SAW (surface acoustic wave)
SBD (smart battery data)
SBE (Small Business Edition)
SCA (Single Connector Attachment)
SCC (Serial Communications Controller or shipping container code)
SCM (supply chain management)
SCU (storage control unit)
SDA (SD Card Association)
SDH (synchronous digital hierarchy)
SDK (software development kit)
SDU (service data unit)
SEA (self-extracting archive or System Enhanced Associates)
Sec (second)
SEO (search engine optimization)
SFC (system file checker)
SFF (small form factor)
SFW (safe for work)
SFX (special effects, or sound effects)
SGD (speech-generating device)
SHV (safe high-voltage)
SID (security identifier)
SIG (signature or Special Interest Group)
SIM (simulation, subscriber identity module)
SIO (super input/output)
SIP (single in-line package or Session Initiation Protocol)
SLA (sealed lead-acid, or service-level agreement)
SLD (second-level domain)
SLI (Scalable Link Interface)
SMB (server message block, system management bus, or Super Mario Bros.)
SMI (System Management Interrupt, or Simple Mail Interface)
SMM (System Management Mode)
SMP (symmetric multiprocessing)
SMS (short message service, storage management subsystem, or systems management server)
SMT (surface-mount technology)
SNA (Systems Network Architecture)
SOA (service-oriented architecture or start of authority)
SoC (system on a chip)
SOI (silicon on insulator)
SOJ DRAM (Small Outline J-lead Dual In-line Memory Module)
SOL (Solitaire, s*** out of luck, or Simple Object Language)
SOP (super operator or standard operating procedure)
SPD (Serial Presence Detection)
SPI (serial peripheral interface, stateful packet inspection, or system packet interface)
SPL (systems programming language)
SPP (Standard Parallel Port)
SPS (standby power supply)
SPX (Sequenced Packet Exchange)
SQL (Structured Query Language)
SSD (solid-state drive)
SSE (Simple Sharing Extension or Streaming SIMD Extensions)
SSH (secure shell)
SSI (server-side include or small-scale integration)
SSL (secure sockets layer or Space Sciences Laboratory)
SSP (storage service provider or System support program)
SSR (solid-state relay, Scalable Sample Rate, or Smart Switch Router)
STD (Internet Standard or standard)
STL (standard library)
STL (stereolithography)
STM (synchronous transport module)
STN (supertwisted nematic)
STP (Spanning Tree Protocol, shielded twisted pair, or software test plan)
STR (Suspend-to-RAM or send to receive)
STS (synchronous transport signal)
Sub (subscript)
Sup (superscript)
SUS (Single Unix Specification, Software Update Service, or suspicious)
SVG (Scalar Vector Graphic)
SVN (Subversion or Apache Subversion)
SWF (Small Web Format)
SYN (synchronize)

TAR (tape archive)
TBA (to be announced)
TBD (to be decided, to be determined)
TCG (Trusted Computing Group)
TCL (transform, clipping, and lighting)
TCO (total cost of ownership)
TCP (transmission control protocol)
TDD (test-driven development or telecommunications device for the deaf)
TDM (team deathmatch)
TDP (thermal design power or thermal design point)
TET (text enhancement technology)
TFS (Team Foundation Server or three-finger salute)
TFT (thin-film transistor)
THD (total harmonic distortion)
THX (thanks)
THz (terahertz)
TiB (tebibyte)
TLD (top-level domain)
TLP (thread-level parallelism)
TLS (transport layer security)
TMI (too much information)
TOC (table of contents)
TOF (top of file or top of form)
Tor (The Onion Router)
TOS (tape operating system, teacher over shoulder, terms of service, terms of use, or type of service)
TPB (The Pirate Bay)
TPI (tracks per inch)
TPM (Trusted Platform Module)
TPS (third-person shooter)
TRS (Tandy Radio Shack, Telecommunications Relay Service, or tip, ring, sleeve)
TSA (Transportation Security Administration)
TSC (timestamp counter)
TSM (Tivoli Storage Manager)
TSR (terminate-and-stay-resident)
TSV (tab-separated values)
TTL (time to live or transistor-transistor logic)
TTS (text-to-speech)
TTV (Twitch.tv)
TTY (teletypewriter or teletype)
TxD (transmit data)
TYT (take your time)

UAC (User Account Control)
UAV (unmanned aerial vehicle)
UCB (unit control block)
UCC (user-created content)
UCE (unsolicited commercial e-mail)
UCS (unified change management)
UDF (Universal Disk Format, user-defined font, or user-defined function)
UDP (user datagram protocol)
UFS (Universal Flash Storage or Unix file system)
UGC (user-generated content)
UHD (ultra high definition)
UHS (ultra high speed)
U/L (upload)
UMA (Upper Memory Area)
UMB (upper memory block)
UMD (Universal Media Disc)
UMS (universal mass storage)
UNC (Uniform Naming Convention or Universal Naming Convention)
UPC (universal product code)
UPI (Ultra Path Interconnect, User Programmatic Interface, or User Program Interface)
UPS (uninterruptible power supply or United Parcel Service)
URC (uniform resource characteristics)
URI (uniform resource identifier)
URL (uniform resource locator)
URN (uniform resource name)
USB (universal serial bus)
USP (unique selling point)
USR (user, or U.S. Robotics)
UTC (Coordinated Universal Time)
UTF (Unicode Transformation Format)
UTM (Unified Threat Management, universal Turing machine, Urchin Tracking Module)
UTP (unshielded twisted pair)
UUI (Universal USB Installer)

VAC (Valve Anti-Cheat)
VAN (value-added network)
VAR (value-added reseller)
VAX (virtual address extension)
VBR (variable bitrate or volume boot record)
VBV (video buffering verifier)
VCD (video compact disc)
VCF (virtual contact file)
VCI (virtual channel identifier)
VCR (video cassette recorder)
VCS (version control system or Video Computer System)
VDC (voltage direct current or video display controller)
VDD (virtual device driver, virtual disk drive)
VDI (virtual desktop infrastrucuture, virtual disk image, VirtualBox Disk Image, or virtual device interface)
VDT (video display terminal)
VDU (visual display unit or video display unit)
VEN (vendor)
Ver (Version)
VFP (Visual FoxPro)
VFW (Video for Windows)
VGA (video graphics array or video graphics adapter)
VHD (virtual hard disk)
VHF (very high frequency)
VHS (video home system)
VID (vendor ID)
VIM (Vendor Independent Messaging)
VIP (very important person)
VLB (VESA Local Bus)
VLC (VideoLAN client)
VLF (very low frequency)
VLK (volume license key)
VMM (Virtual Machine Manager or Virtual Machine Monitor)
VMS (virtual memory system or voicemail system)
VNC (Virtual Network Computing)
VOB (video object)
VoD (video on demand)
VOM (volt-ohm milliammeter)
VPN (virtual private network)
VPS (virtual private server)
VRC (vertical redundancy check)
VRM (voltage regulator module or video RAM)
VSB (Vestigial Side Band)
VSE (Virtual Storage Extended)
VST (Virtual Studio Technology)
VxD (virtual device driver)

WAN (wide area network)
WAP (Wireless Application Protocol or wireless access point)
WAU (weekly active users)
WBT (web-based training)
WCE (World Computer Exchange)
WCN (Windows Connect Now)
WDF (Window Driver Foundation or Windows Driver Frameworks)
WDK (Windows Driver Kit)
WDM (Windows Driver Model or Wavelength Division Multiplexing)
Web (World Wide Web)
WEI (Windows Experience Index)
WEP (Wired Equivalent Privacy)
WFH (work from home)
WFM (Wired for Management)
WFP (Windows file protection)
WFS (Windows Fax and Scan)
WFW (Windows for Workgroups)
WGA (Windows Genuine Advantage)
WMA (Windows Media Audio)
WMF (Windows metafile format or Wikimedia Foundation)
WMI (Windows Management Instrumentation)
WML (wireless markup language or website meta language)
WMM (Microsoft Windows Movie Maker)
WMP (Windows Media Player)
WMV (Windows Media Video)
WMZ (compressed Windows metafile)
WOL (Wake-on-LAN)
WOT (Web of Trust)
WOW (Windows on Windows)
WoW (World of Warcraft)
WPA (Wi-Fi Protected Access)
WPM (words per minute)
WPS (Wi-Fi Protected Setup)
WRU (who are you or where are you)
WSL (Windows Subsystem for Linux)
WSP (what's up)
WTB (willing to buy or want to buy)
WTF (what the f***)
WTG (way to go)
WTH (what the hell)
WTS (willing to sell or want to sell)
WTT (willing to trade)
WUF (where are you from)
WWW (World Wide Web)

XDF (extended density format)
XDF (extended density format)
XFR (Extended Frequency Range)
XML (extensible markup language)
XMS (extended memory specification)
XMT (transmit)
XNA (XNA's Not Acronymed)
XNS (Xerox Network Services)
XPM (XP mode)
XPS (XML Paper Specification or extreme performance system)
XSF (XMPP Standards Foundation)
XSL (extensible stylesheet language)
XSS (cross-site scripting)

None known

ZAK (Zero Administration Kit)
ZBR (zone bit recording)
ZCS (Zimbra Collaboration Suite)
ZFS (zettabyte file system)
ZiB (zebibyte)
ZIF (zero insertion force)
ZIP (Zone Information Protocol or Zoning Improvement Plan)