You finally want to know what all those shortenings all around the internet mean?
Well, here is a list with some of them with their meaning.

  

    
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[A - M]
 
  
  

    
[Internet Country Domains]
    
[N - Z]
 
  

   -A- 
ACA     : Asynchronous Communications Adapter                  
A/D     : Analog to Digital
A/N     : Alphanumeric
AC      : Altern`ting Current (vs DC)
ACK     : Acknowledge (logic signal)
ACIA    : Asynchronous Communication Interface Adapter
ACL     : Advanced CMOS Logic (as in 74ACL245)
AF      : Audio Frequency
AFC     : Automatic Frequency Control
AGC     : Automatic Gain Control
AGP     : Accelerated Graphics Port
AI      : Artificial Intelligence
ALC     : Automatic Level Control
ALU     : Arithmetic Logic Unit
AMD     : Advanced Micro Devices                              
AMP     : Asymmetric MultiProcessing
ANSI    : American National Standard Institute                
API     : Application Programming Interface
ARRL    : American Radio Relay League
AS      : Advanced Schottky (as in 74AS245)
ASCII   : American Standard Code for Interchange Information  
ASIC    : Application-Specific Integrated Circuit
ASK     : Amplitude-Shift Keying
ATA     : AT-bus Attachment                                   
ATC     : Air Traffic Control
ATAPI   : AT-bus Attachment Packet Interface      
ATM     : Asynchonous Transfere Mode
AV      : Audio/Visual
AVC     : Automatic Volume Control
   -B-
B       : Byte
b       : bit
B&W     : Black & White (TV)
BASIC   : Beginners' All-purpose Symbolic Instruction Code
BBD     : Bucket Brigade Device
BCD     : Binary Coded Decimal
BDC     : Backup Domain Controller
BEV     : Billion Electron Volts
BIFET   : BIpolar Field-Effect Transistor
BMP     : BitMaP
BNC     : Baby N Connector
BPI     : Bits Per Inch
Bps     : Bytes Per Second
bps     : Bits Per Second
BRI     : Basic Rate Interface
BW      : BandWidth
   -C-
CAS     : Column Address Strobe
CAD     : Computer Assisted Design
CADA    : Computer Assisted Design and Analysis
CADD    : Computer Assisted Design and Development
CAE     : Computer Assisted Engineering
CAM     : Computer Assisted Manufacturing
CAN     : CANcel
CAS     : Column-Address Strobe (logic signal) 
CATV    : CAble TeleVision
CAV     : Constant Angular Velocity
CB      : Citizens' Band
CBI     : Complementary Binary
CC      : Constant Current
CCD     : Charge Coupled Device (used in cameras)
CCITT   : Comité Consultatif International Télégraphique et Téléphonique
CCTV    : Closed Circuit TeleVision
CCW     : Counter Clock-Wise
CD      : Compact Disk
(D)CD   : (Data) Carrier Detected (modems)
CD-I    : Compact Disk - Interactive
CD-R    : Compact Disk Recordeble
CD-ROM  : Compact Disk Read Only Memory
CD-RW   : Compact Disk ReWriteable
CECL    : Cascode Emitter-Coubled Logic
CEMF    : Counter ElectroMotive Force
CerDIP  : Ceramic Dual Inline Package
CES     : Consumer Electronics Show
CF      : Center Frequency
CFM     : Cubic Feet per Minute
CGA     : Colour Graphics Adapter
CGI     : Common Gateway Interface
CISC    : Complex Instruction Set Computer
CL      : Current Loop
CLOS    : Corel Linux Operating System
CLV     : Constant Linear Velocity
CMOS    : Complementary Metal Oxide Semiconductor
CODEC   : COder/DECoder
CP/M    : Control Program for Microcomputers (operating system)
CPI     : Character Per Inch
CPU     : Central Processing Unit
CRC     : Cyclic Redundancy Check
CRT     : Cathode Ray Tube (TV/Monitor display, vs LCD)
CS      : Control Strobe (logic signal)
CSA     : Canadian Standards Association (UL's Canadian counterpart)
CTC     : Counter Timer Circuit
CTS     : Clear To Send (protocol signal)
CV      : Constant Voltage
CVT     : Constant Voltage Transformer (aka ferroresonant by Sola(TM))
CW      : ClockWise
   -D-
DAO     : Disk At Once
DCE     : Data Circuit terminating Equipment
DHCP    : Dynamic Host Configuration Protocol
DHTML   : Dynamic HyperText Mark-up Language
DIMM    : Dual Inline Memory Module
DLL     : Dynamic Link Library
DMA     : Direct Memory Access
DNS     : Domain Name Server
DOS     : Disk Operating System
DP      : Dot Pitch
DPI     : Dots Per Inch
DRAM    : Dynamic Random Accessible Memory
DTE     : Data Terminal Equipment
DVD     : Digital Video Disc / Digital Versatile Disc
   -E-
EBCDIC  : Extended Binary-Coded-Decimal Interchange Code
EDORAM  : Extended Data Out Random Accessible Memory
EEPROM  : Electrically Erasable Programmable Read Only Memory
EGA     : Enhanced Graphics Adapter
EIDE    : Enhanced Integrated Drive Electronics
EISA    : Extended Industrial Standard Architecture
EPROM   : Erasable Programmable Read Only Memory
ESCD    : Extended System Configuration Data
ESDI    : Enhanced Small Device Interface
   -F-
FAT     : File Allocation Table
FTP     : File Transfer Protocol
FET     : Field Effect Transistor
   -G-
GB      : Giga Byte (= 1024 Mega Bytes)
   -H-
HDD     : HarDDisk
HDLC    : High-level Data Link Control
HP      : Hewlett Packard
HTML    : HyperText Mark-up Language
HTTP    : HyperText Transport Protocol
   -I-
I/O     : Input/Output
IBM     : International Business Machines
IC      : Integrated Circuit
IDE     : Integrated Drive Electronics
IEEE    : Institute of Electrical and Electronical Engineers
IRQ     : Interrupt ReQuest
ISAPI   : Internet Server Application Programming Interface
ISA     : Industrial Standard Architecture
ISDN    : Integrated Services Digital Network
ISO     : International Standards Organisation
ISP     : Internet Service Provider
   -J-
JPEG    : Joint Photographers Expert Group
   -K-
KB      : Kilo Byte (=1024 Bytes)
KDE     : K's Desktop Enviroment
   -L-
LAN     : Local Area Network
LAPB    : Link Access Procedure Balanced mode
LAPD    : Link Access Procedure D-channel
LCN     : Logic Channel Number
LPT     : Line PrinTer
   -M-
MAC     : Apple Macintosh
MB      : Mega Byte (=1024 Kilo Bytes)
MCA     : Micro Channel Architecture
MODEM   : MOdulator/DEModulator
MS      : MicroSoft
   

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