I've made a database of more than 440 abbreviations and their full forms. Here are they:
ID Abbreviations Full Forms
335 3DES Three-Data Encryption Standard
229 3GPP Third-generation Partnership Project
234 8PSK 8-Phase shift keying
140 AAC Advanced Audio Codec
172 AACS Advanced Access Content System
283 ACD Automated Call Distributor
374 ACL Access Control Lists
419 ACM Association of Computer Machinery
187 ACP Administrative Control Panel
314 ACPI Advanced Configuration and Power Interface
167 ACTeN Anticipating Content Technology Need
431 ADF Automatic Document Feeder
425 ADIOS Automated Download and Installation of Operating Systems
111 ADS Alternate Data Streams
337 AES Advacned Encryption Standard
158 AGP Advanced Graphics Port
159 AI Artificial Intelligence
323 AIEE American Institue of Electrical Engineers
118 AMI American Megatrends
448 AOE Age of Empires
136 AOL America Online
295 AP Access Point
28 API Application Programming Interface
315 APM Advanced Power Management
426 APPLE Apple PugetSound Program Library Exchange
204 ARPANET Advanced Reasearch Projects Agency Network
364 ASCII American Standard Code for Information Interchange
98 ASF Advanced Streaming Format
124 ASP Active Server Pages
270 ATA Advanced Technology Attachment
373 AUP Accptable Use Policies
183 AV Audio/Video
418 AZPR Adavanced Zip Password Recovery
184 BCC Blind Carbon Copy
443 BeATS Bluetooth enabled Audio Tour System
236 BEP Bit Error Probability
66 BES Blackberry Enterprise Server
440 BHOs Browser Helper Objects
404 BiBC British Internet Broadcasting Company
169 BREW Binary Runtime Environment for Wireless
238 BSS Base Station System
239 BSSGP Base station system General packet radio service Protocol
51 CAD Computer Aided Designing
53 CAE Computer Aided Engineering
52 CAM Computer Aided Manugacturing
383 CARO Computer Anti-virus Research Organisation
433 CAS Column Address Strobe
296 CAS Column Access Strobe
397 CCD Charged Couple Device
3 CD Compact Disc
220 CDMA Code Division Multiple Access
114 CDS Copernic Desktop Search
175 CE Consumer Electronics
414 CF Compact Flash
16 CI Communication Integrator
363 CISSP Certified Information System Security Professionals
435 CMOS Complimentary Metal-Oxide Semiconductor
384 CMOS Complimentary Metal Oxide Semiconductor
449 COD Cash-on Delivery
97 codec Compression-Decompressing or Coding-Decoding
382 COM Component Object Model
89 CPI Characters per inch
7 CPU Central Processing Unit
152 CRT Cathode Ray Tube
244 CS Coding Scheme
221 CSD Circuit Switched Data
281 CSE Customer Service Executive
300 CSMA/CD Carrier Sense Multiple Access with Collission Detection
75 CSS Cascaded Style Sheets
266 CSV Common Seperated Values
413 CTS Carpal Tunnel Syndrome
276 CVR Cached Video Recording
163 DAB Digital Audio Broadcasting
377 DAC Discretionary Access Control
370 DAME Dark Angle's Multiple Encryptor
101 DAP Download Accelerator Plus
203 DARPA Defence Advanced Research Projects Agency
137 DAT Digital Audio Tape
84 dB decibel
133 DBMS DataBase Management System
292 DCC Direct Cable Connection
182 DCP Framework Device Control Protocol Framework
130 DDE Dynamic Data Exchange
332 DDoS Distributed Denial of Service
259 DDR Double Data Rate
338 DES Data Encryption Standard
117 DFI Diamond Flower
285 DHCP Dynamic Host Controller Protocol
180 DHR Digital Home Renderer
178 DHS Digital Home Server
61 DHTML Dyanimc HyperText Markup Language
170 DIG Disney Internet Group International
309 DIMMs Dual Inline Memory Modules
445 DLP Digital Light Processing
277 DMA Direct Memory Access
164 DMB Digital Multimedia Broadcast
213 DMCA Digital Millenium Copyright Act
339 DMZ DeMilitarised Zone
297 DNS Domain Name System
9 DOS Disk Operating System
10 DoS Denial of Service
60 DOT Dynamic Overclocking Technology
188 dpi dots per inch
258 DPS Dual Power System
307 DRAM Dynamic Random Access Memory
94 DRM Digital Rights Management
146 DSD Direct Stream Digital
148 DSL Digital Suscriber Line
340 DSSS Direct Sequence Spread Spectrum
147 DST Direct Stream Transfer
197 DTD Document type Definition
177 DTH Direct to Home
341 DTIM Delivery Traffic Indication Message
96 DTS Digital Thetare Systems
162 DVB Digital Video Broadcasting
161 DVB-H Digital Video Broadcast - Handheld
166 DVB-T Digital Video Broadcasting - Terrestrial
4 DVD Digital Vertasile Disc
446 DVI Digital Video Interface
279 DWSE Disc Wizard Starter Edition
95 EAC Exact Audio Copy
342 EAP Extensible Authentication Protocol
343 EAP-MD5 Extensible Authentication Protocol - Message Digest 5
344 EAP-TLS Extensible Authentication Protocol - Transport Layer Security
99 EBML Extensible Binary Meta Language
298 ECC Error Correction Code
299 E-Commerce Electronic-Commerce
316 ECP Extended Capabilities Port
228 ECSD Enhanced Circuit-switched data
223 EDGE Enhanced Data Rate for Global System for Mobile Communications Evolution
385 EEPROM Electrically Erasable and Programmable Read-Only Memory
227 EGPRS Enhanced General Packet Radio Service
386 EICAR European Institue for Computer Anti-virus Research
432 EM64T Extended Memory 64 Technique
82 E-mail Electronic-mail
390 EPO Entry Point Obscuring
317 EPP Enhanced Parallel Port
387 EPROM Erasable and Programmable Read-Only Memory
59 Esc Escape
287 ESD ElecrtoStatic Discharge
345 ESS Extended Service Set
346 ESSID Extended Service Set Identifier
160 ETSI European Telecommunications Institute Standards
372 EULA End-User License Agreement
410 EVF Electronic Viewfinder
168 ExEn Execution Engine
29 FAT File Allocation Table
116 FBW2 File Backup Watcher 2
447 FEAR First Encounter Assault Recon
149 FhG Fraunhofer
347 FHSS Frequency Hopping Spread Spectrum
194 FOAF Friend of a Friend File
155 FPS First Person Shooter
81 fps frames per second
260 FSB Front Side Bus
2 FTP File Transfer Protocol
40 Gb Gigabit
37 GB Gigabyte
87 GBA Game Boy Advance
113 GD2 Google Desktop 2
412 GDI Graphics Device Interface
411 GDS Google Desktop Search
230 GERAN Global system for mobile communications/ Enhanced data for global evolution Radio Access Network
240 GGSN Gateway General packet radio service Support Node
55 GHz Gigahertz
430 GLH Goes Like Hell
233 GMSK Gaussian minimum shift keying
105 GPL General Public License
226 GPRS General Packet Radio Service
33 GPU Graphical Processing Units
219 GSM Global System for Mocile Communications
242 GTP General Telemetry Processor
50 GUI Graphical User Interface
171 HD high-definition video
46 HDD Hard Disk
286 HDR High Dynamic Range
434 HDR High Dynamic Range
73 HDTV High Definition Television
69 HP Hewlett-Packerd
327 HPNA Home Phoneline Networking Alliance
222 HSCSD High Speed Circuit Switched Data
408 HT HyperThreading
173 HTiB Home Theatre in a Box
1 HTTP Hyper Text Transfer Protocol
20 IBM International Business Machines
205 ICCC International Computer Communication Conference
134 ICS Internet Connection Sharing
102 IDA Internet Download Accelerator
261 IDE Integrated Drive Electronics
333 IDS Intrusion Detection System
72 IE Internet Explorer
322 IEEE Institue of Electricals and Electronics Engineers
201 IETF Internet Engineering Task Force
186 IIS Internet Information Services
103 IM Instant Messenging
129 IMAP Image Mastering Applications Programming
128 IMAPI Image Mastering Applications Programming Interface
405 IMDb Internet Movie Database
232 IMT-2000 Internation Mobile Telecommunications - 2000
17 IP Intrenet Protocol
243 IP/X.25 Internet Protocol/X.25
212 IPR Intellectual Property Rights
154 IPTV Internet Protocol Television
301 IPX Internet Packet eXchange
288 IR Infrared
195 IRC Internet Relay Chat
324 IRE Institute of Radio Engineers
313 ISA Industry Standard Architecture
302 ISP Internet Service Provider
381 ISS Internet Security Scanner
106 IT Information Technology
231 ITU International Telecommunication Unions
348 ITU-T Internation Telecommunications Union - Telecommunication
282 IVR Interactive Voice Response
262 JBOD Just a bunch of disks
71 JPEG Joint Photographic Experts Group
407 JRA Japana Robot Association
126 JSP Java Server Pages
67 JVM Java Virtual Machine
38 KB Kilobyte
41 Kb Kilobit
56 KHz Kilohertz
109 KPF Kerio Personal Firewall
235 LA Link Adaptation
24 LAN Local Area Network
49 LCD Liquid Crystalline Display
254 LED Light Emitting Diodes
19 Linux Linux is not UniX
245 LLC Low-Layer Capability
417 LLU Local Loop Unbundling
325 LMSC Local area network/Metropolitan area network Standards Committee
11 LOGO Language of Grpahic Oriented
144 LPCM Linear Pulse Code Modulation
274 LR Longitudinal Recording
421 LSS Live Security Service
420 LUG Linux Users Group
398 LZW Lempel-Ziv-Welch
58 Mac Macintosh
246 MAC Mobile Allocation Control
26 MAN Metropolitan Area Network
39 Mb Megabit
36 MB Megabyte
83 MBR Master Boot Record
388 MBS Master Boot Sector
241 MCS Modulation Coding Scheme
275 MCSI Medical Computer Society of India
138 MD MiniDisc
437 MDI Multiple Document Interface
47 Me Millenium Edition
289 MFD Multi-Function Device
57 MHz Megahertz
202 MIT Massachusetts Institue of Technology
145 MLP Meredian Lossless Packaging
156 MMORPG Massively Multiplayer Online Role Playing Game
193 MMS Multimedia Messaging Service
54 MODEM Modulator DEModulator
409 mp megapixel
78 MPAA Motion Pictures Association of America
399 MPEG Motion Pictures Expert Group
416 MSD Memory Stick Duo
125 MSDN Microsoft Developer Network
63 MSI Micro-Star International
367 MTE MuTation Engine
389 MUTEX MUTual Exclusion object
174 MVNOs Mobile Virtual Network Operators
349 NAT Network Address Translation
27 NCB Network Control Blocks
207 NCP Network Control Protocol
429 NCQ Native Command Queuing
272 NCQ Native Command Queuing
199 NCSA National Centre for Supercomputing Applications
369 NED Nuke Encryption Device
21 NetBIOS Network Basic Input/Output System
328 NIC Network Interface Card
123 NLA Network Location Awareness
90 NLQ Near Letter Quality
224 NME New Musical Express
65 NOC Network Operations Centre
157 NPC Non Player Character
436 NTLDR New Technology Loader File
151 NTSC National Televisions System Committee
424 NUE Network User Environment
442 OASIS Organization for the Advancement of Structured Information Standards
422 ODD Optical Disk Drives
336 OFDM Orthogonal Frequency Division Multiplexing
104 Ooo OpenOffice.org
22 OS Operating System
77 P2P Peer-to-Peer
209 P3P Platform for Privacy Preferences
150 PAL Phase Alternation Line
321 PAN Personal Area Network
23 PC Personal Computer
255 PCB Printed Circuit Boards
256 PCI Peripheral Component Interconnect
143 PCM Pulse Code Modulation
350 PCMCIA Personal Computer Memory Card International Association
365 PCS Personal Communication Service
121 PDA Personal Digital Assistant
400 PDF Portable Document Format
366 PEAP-MS-CHAP Protected Extensible Authentication Protocol with MicroSoft Challenge Handshake Authentication Protocol
280 PFN Page Frame Number
80 PIN Personal Identification Number
64 PMP Personal Media Player
294 PMPO Peak Music Power Output
392 POC Prrof of Concept
391 POP3 Post Office Protocol 3
303 PPP Point-to-Point Protocol
217 PRIM Presence and Instant Messaging Protocol
70 PS PlayStation
92 PSP PlayStation Portable
211 PSTN Public Switched Telephone Network
179 PVR Personal Video Recorders
181 QoS Quality of Service
318 RAD Rapid Application Development
351 RADIUS Remote Authentication Dial-In User Service
268 RAFF Rotarty Acceleration Feed Forward
263 RAID Reductant Array of Independent Disks
34 RAM Random Access Memory
393 RAT Remote Access Trojan or Trapdoor
132 RD Remote Desktop
319 RDBMS Relational Database Management Systems
247 RF Radio Frequency
361 RFID Radio Frequency Identification
93 RGB Red Green and Blue
142 RIAA Recording Industry Association of America
352 RJ-11 Registered Jack 11
353 RJ-45 Registered Jarck 45
248 RLC Radio Link Control
14 RMCP Remote Mail Checking Protocol
293 RMS Root Mean Square
196 ROI Return on Investment
35 ROM Read-Only Memory
122 RPC Remote Procedure Call
86 RPG Role Playing Games
290 rpm rotations per minute
185 RR request Return Receipt Request
190 RSS Really Simple Syndication
30 RTF Rich Text Format
354 RTS Request to Send
85 RTS Real Time Strategy
362 RTTS Real Time Tracking Systems
200 RUN Responsible Use of Network
6 RW ReWritable
141 SACD Super Audio Compact Disc
269 SATA Serial Advanced Technology Attachment
380 SATAN Security Administrator's Tool for Analyzing Networks
120 SBM Smart Boot Manager
304 SCSI Small Computer System Interface
415 SD Secure Digital
153 SDDS Sony Digital Dynamic Sound
444 SDK Software Development Kit
165 S-DMB Satellite Digital Multimedia Broadcast
406 SDR Sony Dream Robot
284 SEM Search Engine Marketing
189 SEO Search Engine Optimisation
305 SFF Small Form Factor
100 SFS Simple File Shredder
62 SGML Standardised General Markup Languages
249 SGSN Serving General packet radio service Support Node
308 SIMMs Single Inline Memory Modules
216 SIMPLE Session Iniation Protocol for Instant Messaging and Presence Leverage
215 SIP Session Iniation Protocol
257 SLI Scalable Link Interface
355 SLIP Serial Line Internet Protocol
401 SLR Single-Lens Reflex
273 SMART Self Monitoring And Reporting Technology
198 SMIL Sychnorized Multimedia Integration Language
427 SMP Synchronous MultiProcessor
267 SMPSes Switched-mode Power Supplies
192 SMS Short Message Service
13 SMTP Simple Mail Transfer Protocol
250 SNDCP Subnetwork-dependent convergence protocol
375 SNMP Simple Network Management Protocol
191 SNS Social Networking Site
108 SPF Sygate Personal Firewall
306 SRAM Static Random Access Memory
112 SS&D Spybot - Search and Destroy
330 SSIDs Service Set Identifiers
127 SSL Secure Socket Layer
176 STB Set-Top Box
76 SVCD Super Video Compact Disc
311 SVGA Standard Video Graphics Array
439 TAN Transaction Number
131 TAPI Telephone Application Programming Interface
43 Tb Terabit
42 TB Terabyte
252 TBF Temporary Block Flows
278 TCG Trusted Computing Group
206 TCP/IP Transmission Control Ptotocol/ Internet Protocol
402 TIFF Tagged Image File Format
358 TKIP Temporal Key Integrity Protocol
271 TLER Time Limited Error Recovery
394 TOM Top of Memory
368 TPE Trident Polymorphic Engine
441 TPM Trusted Platform Module
395 TSR Terminate and Stay Resident
403 TTL Thru-The-Lens
291 UATA Ultra Advanced Technology Attachment
237 UDP User Diagram Protocol
265 UMD Universal Media Disc
251 UMTS Universal Mobile Telecommunications System
208 UNDP United Nations Development Programme
329 UPnP Universal Plug and Play
8 UPS Uninterrupted Power Supply
5 URL Uniform Resource Locator
12 USB Universal Serial Bus
253 UTRAN Universal mobile telecommunications system Terrestrial Radio Access Network
110 VB Visual Basic
438 VBA Visual Basic for Applications
376 VBS Visual Basic Script
378 V-CAD Virus-Computer Aided Design
379 V-CAM Virus-Computer Aided Manufacturing
68 VCD Video Compact Disc
371 VCL Virus Creation Laboratory
310 VGA Video Graphics Array
74 VoIP Voice over Internet Protocol
48 Vol Volume
356 VPN Virtual Private Network
107 VRDB Virus Recovery Database
210 VRML Virtual Reality Modeling Language
32 W3C World Wide Web Consortium
25 WAN Wide-Area Network
225 WCDMA Wideband Code Division Multiple Access
357 WECA Wireless Ethernet Compatibility Alliance
331 WEP Wired Equivalent Protocol
135 WIA Windows Image Aqcuisition
334 WIDS Wireless Intrusion Detection System
264 WiFi Wireless Fidelity
88 WIGI Women in Games International
326 WiMAX Worldwide Interoperability for Microwave Access
79 WinFS Windows Future Storage
214 WIPO World Intellectual Property Organization
320 WLAN Wireless Local Area Network
139 WMA Windows Media Audio
359 WPA Wireless fidelity Protected Access
360 WPA-PSK Wireless fidelity Protected Access Pre-Shared Key
396 WSH Windows Scripting Host
428 WTL Windows Template Library
31 WWW World Wide Web
91 WYSIWYG What you see is what you get
312 XGA eXtended Graphics Array
15 XML eXtensible Markup Language
218 XMPP eXtensible Messaging and Presence Protocol
119 XOSL eXteneded Operating System Loader
18 XP eXperience
44 YB Yogabyte
45 Yb Yogabit
115 YDS Yahoo! Desktop Search