PC Acronyms Defined - Sorted by Acronym HomePage
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# Acronym Group Company Description
1.  3DES Encryption   Triple Data Encryption
2.  3GL Software Language   Third Generation Language (programming language)
3.  4GL Software Language   Fourth Generation Language (descriptive language)
4.  802.11b Wireless Network   An IEEE wireless networking standard that specifies a maximum data transfer rate of 11Mbps on the 2.4GHz Frequency.
5.  802.11g Wireless Network   An IEEE wireless networking standard that specifies a maximum data transfer rate of 54Mbps on the 2.4GHz Frequency, backward compatible with 802.11b devices.
6.  802.11n Wireless Network   An IEEE wireless networking standard based on MIMO (Multiple Inputs/Multiple Outputs) that specifies a maximum data transfer rate of 100 Mbps on the 2.4GHz Frequency, backward compatible with 802.11b devices.
7.  802.16e Wireless Network   Mobile Wimax
8.  A/P Accounting   Accounts Payable
9.  A/R Accounting   Accounts Receivable
10.  AACS Encryption   Advanced Access Content System. Encryption scheme used by the High Defintion DVDs.
11.  AC     Alternating Current
12.  ACK     Positive Acknowledgment
13.  ADSL Internet   Asymmetric DSL
14.  AES Encryption   Advanced Encryption Standard, encryption methods using 128-bit, 192-bit or 256-bit encryption keys.
15.  AES-NI Intel CPU Intel AES New Instructions, Intel's seven software instructions that accelerate data encryption and decryption on the CPU chip.
16.  AfriNIC Internet IANA Africa Internet Numbers Registry
17.  AGP     Accelerated/Advanced Graphics Port
18.  AI     Artificial Intelligence
19.  AJAX Java   Asynchronous JavaScript and XML combined to show windows like web pages in a browser
20.  AMD Company   Advanced Micro Devices, Inc.
21.  ANSI Organization   American National Standards Institute
22.  AOE Protocol   ATA over Ethernet
23.  AOL Company   America Online
24.  API     Application Program Interface
25.  APNIC Internet IANA Asia-Pacific Network Information Center
26.  APPS     Applications
27.  ARIN Internet IANA American Registry for Internet Numbers
28.  ARP Protocol   Address resolution Protocol
29.  ASCII     American Standard Code for Information Interchange
30.  ASP Software Language Microsoft Active Server Page
31.  ASYNC     Asynchronous
32.  ATAPI Interface   Advanced Technology Attachment Packet Interface
33.  AVX Intel CPU Intel Advanced Vector Extension.These are Intel's CPU instructions, which is designed to accelerate multimedia such as image, video, and audio processing. 3D modeling, analysis, scientific simulation, and financial analytics performaced will also improve.
34.  AWG     American Wire Gage, specifies the thickness of a wire
35.  B2B     Business-To-Business
36.  BASIC Software Language   Beginner's All-purpose Symbolic Instruction Code
37.  BBS     Bulletin Board System
38.  BCC: Email   Blind Carbon Copy
39.  BDOS O/S   Basic Disk Operating System
40.  BIOS     Basic Input/Output System
41.  BLK     Block
42.  BOOTP Internet   Bootstrap Protocol
43.  BOS O/S   Basic Operating System
44.  BSA Organization   Business Software Alliance. Group which monitors software piracy.
45.  C Software Language   C Programming Language
46.  CAB File Compression Microsoft Compressed Application Binary
47.  CAD     Computer Aided Design
48.  CAPS     Capitals (Upper Case Letters)
49.  CBT     Computer Based Training
50.  CC: Email   Carbon Copy
51.  CCD     Charged-Coupled Device (image sensor on a digital camera)
52.  CCP     Certified Computing Professional
53.  CDMA protocol   Code Division Multiple Access, protocol for cell phones
54.  CDO   Microsoft Collaboration Data Objects
55.  CD-R Media   Compact Disk - Recordable
56.  CD-ROM Media   Compact Disk - Read Only Memory
57.  CD-RW Media   Compact Disk - Rewritable
58.  CEO Title   Chief Executive Officer
59.  CERT     Computer Emergency Response Team
60.  CES     Consumer Electronics Show.
61.  CFO Title   Chief Financial Officer
62.  CGA Video Interface   Color Graphics Adapter
63.  CGI Hardware   Computer Graphics Interface
64.  CHAR     Character
65.  CMOS Hardware   Complementary Metal-Oxide Semiconductor
66.  COAX     Coaxial Cable
67.  COBAL Software Language   Common Business-oriented Language
68.  CODEX Organization   Computer Dealers Exposition
69.  COM1     First serial Port (asynchronous port on a PC)
70.  COM2     Second serial Port (asynchronous port on a PC)
71.  COMM     Communications
72.  COMP     Compare
73.  COMSAT     Communications Satellite Corporation
74.  CON     Console
75.  COO Title   Chief Operating Officer, senior manager who is responsible for managing the company's day-to-day operations.
76.  CP/M O/S Digital Research Control Program for Microcomputers
77.  CPA Title   Certified Public Accountant
78.  CPI     Characters Per Inch
79.  CPU Hardware   Central Processing Unit
80.  CR     Carriage Return
81.  CR/LF     Carriage Return/Line Feed
82.  CRC     Cyclic Redundancy Check
83.  CRT Hardware   Cathode Ray Tube
84.  CST     Central Standard Time
85.  CSV File Format   Comma-Separated Value
86.  CTO Title   Chief Technology Officer
87.  CTS     Clear To Send
88.  CUDA Graphics   Compute Unified Device Architecture. This is a C-Compiler and set of development tools developed by Nvidia to allow programmers to use the C programming language to code algorithms for execution on the graphics processing unit.
89.  CVS Software   Concurrent Versions System, open source software revision system.
90.  CVSNT Software   Concurrent Versions System, open source software revision system using a client-server model.
91.  CWUSB Wireless USB   Certified Wireless USB. The new wireless extension to USB using Ultra-wideband (UWB) radio platform as developed by the WiMedia Alliance.
92.  CXML Software Language   Commerce Extensible Markup Language
93.  CYMK     Cyan-Yellow-Magenta-Black (color model)
94.  Daemon Linux   A program that lies dormant in the background of your computer until a networking task calls it into action.
95.  DAO   Microsoft Data Access Object
96.  DARPA Organization   Defense Advanced Research Projects Agency
97.  DAS Storage   Direct-Attached Storage, or individual drives connected to every server or workstation.
98.  DB Database   Data Base
99.  DB2 Database IBM IBM Database 2
100.  DBA Title   Data Base Administrator
101.  DBM Title   Data Base Manager
102.  DC     Direct Current
103.  DCOM     Distributed Component Object Model
104.  DDE Protocol Microsoft Dynamic Data Exchange. An interprocess communication (IPC) system built into an operating systems to allow two running applications to share the same data. This protocol is being replaced by OLE.
105.  DDNS Network   Dynamic Domain Name System
106.  DDR Memory   Double-Data-Rate, type of pc memory. Operates at 2.5 volts with a speed range of 100-400 Mhz.
107.  DDR2 Memory   Double Data Rate 2 memory, most common memory in PCS used in 2007. Operates at 1.8 volts with a speed range of 400-800 Mhz.
108.  DDR3 Memory   Double Data Rate 3 memory, new memory for future PCs. Operates at 1.5 volts with a speed range of 800-1600 Mhz.
109.  DECT 6.0 Phones   Digitally enhanced cordless technology. Replacement for the 2.4 and 5 GHz bands coredless phone technoloy. Uses the 1.9 GHz frquency and will not interfere with wireless 802.11b/g computer networks.
110.  DEFRAG     Defragment
111.  DFS     Distributed File System. Allows you to organize a virtual view of all shared folders or file shares in an organization.
112.  DHCP Protocol   Dynamic Host Configuration Protocol
113.  DIMM Memory   Dual In-Line Memory Module
114.  DIR O/S Command   Directory (file)
115.  DisplayPort Video Interface   Latest digital video interface standard from the Video Electronics Standards Association (VESA). VESA's vision is to replace all existing legacy interfaces such as VGA, DVI,HDMI and UDI with this new standard.
116.  DLP     Digital Light Processing (computer or TV display type)
117.  DLT Media   Digital Linear Tape
118.  DMA Memory   Direct Memory Access/Addressing
119.  DMS Document Mgmt   Document Management System. Computer system or software to store and find all your company documents. Overlaps with ECM.
120.  DMZ Network   Demilitarized Zone
121.  DNS Network   Domain Naming System
122.  DOA     Dead on Arrival
123.  DOD Organization   Department of Defense
124.  DOS O/S   Disk Operating System
125.  DOS Attacks     Denial of Service Attacks. A technique using many computers pinging your site over and over trying to overload it.
126.  DP     Data Processing
127.  DPCP Content Protection   DisplayPort Content Protection
128.  DPI Printing   Dots Per Inch
129.  DRAM Memory   Dynamic Random Access Memory
130.  DR-DOS     Digital Research-Disk Operating System
131.  DRM Content Protection   Digital Rights/Distributed Resource Management, copy protection for music or video
132.  DSL Internet   Digital Subscriber Line
133.  DSP     Digital Sound Processor
134.  DTE     Data Terminal Equipment
135.  DVD Media   Digital Video Disk
136.  DVD-R Media   Digital Video Disk-Recordable
137.  DVD-RAM Media   Digital Versatile Disc-RAM
138.  DVD-ROM Media   Digital Versatile Disc-ROM
139.  DVI Video Interface   Digital Video Interface
140.  EBASIC Software Language   Extended BASIC
141.  EBCDIC   IBM Extended Binary Coded Decimal Interchange Code
142.  EBOOK     Electronic Book
143.  ECC Memory   Error Correction Code
144.  ECM Document Mgmt   Enterprise Content Management.
145.  EDI     Electronic Data Interchange
146.  EDO     Extended Data Out
147.  EDS Company   Electronic Data Systems
148.  EEPROM     Electrically Erasable Programmable Read-Only Memory
149.  EGA Video Interface   Enhanced Graphics Adapter
150.  EIA Organization   Electronic Industries Association
151.  EIDE Interface   Enhanced Integrated Drive Electronics
152.  EISA Interface   Extended Industry Standard Architecture
153.  E-MAIL Email   Electronic Mail
154.  EMI     Electromagnetic Interference
155.  EOF     End of File
156.  EOJ     End of Job
157.  EOL     End of Line
158.  EOT     End of Tape (marker)
159.  EPROM Hardware   Electrically Programmable Read Only Memory
160.  ERP     Enterprise Resource Planning
161.  eSATA Interface   External (SATA) Serial Advanced Technology Attachment
162.  ESC     Escape
163.  ESD     Electrostatic Discharge
164.  ESDI     Enhanced Small/System Device Interface
165.  ESRB Organization   Electronic Software Ratings Board. Sets ratings on computer games.
166.  ETB     End of Transmission Block
167.  EULA     End-User License Agreement
168.  FAQ     Frequently Asked Question
169.  FAT O/S File System   File Allocation Table
170.  FAX     Facsimile
171.  FCC Organization   Federal Communications Commission
172.  FD Media   Floppy Disk
173.  FDC Hardware   Floppy Disk Controller
174.  FDDI Network   Fiber Digital Device Interface
175.  FDX     Full Duplex
176.  FIFO Accounting   First-In, First-Out
177.  FILO Accounting   First-In, Last-Out
178.  FLD     Field
179.  FM     Frequency Modulation
180.  FMT     Format
181.  FQDN Network   Fully Qualified Domain Name
182.  FTP Protocol   File Transfer Protocol
183.  FUNC     Function
184.  FYI     For Your Information
185.  G/L Accounting   General Ledger
186.  GAAP Accounting   Generally Accepted Accounting Principles
187.  GB     Gigabyte (1,024 megabytes)
188.  GDI     Graphical Device Interface
189.  GIMO     GNU Image Manipulation Program (Linux)
190.  GIRLS MV Database   Generalized Information Retrieval Language & System
191.  GMR     Giant Magneto-Resistive (hard disk, head read technology)
192.  GMT     Greenwich Mean Time
193.  GNL     GNU General Public License
194.  GNOME     GNU Network Object Model Environment. A windows-style environment that is incorporated into many Linux distributions.
195.  GPS     Global Positioning Satellite/System
196.  GPU Graphics   Graphics Processing Unit
197.  GUI     Graphical User Interface
198.  HDCP Content Protection   High-Bandwidth Digital Content Protection. A copyright protection scheme used by HDMI & required for Blu-ray / HD dvds.
199.  HDMI Video Interface   High-Definition Multimedia Interface. This single cable all-digital interface carries uncompressed audio and video signals and is backwards compatible with the video-only digital interface DVI.
200.  HDMI 1.0 Video Interface   HDMI format released in 2002 with bitrate of 4.9 gigabytes per second.
201.  HDMI 1.1 Video Interface   HDMI format released in 2004 with bitrate of 4.9 gigabytes per second. Support for DVD Audio was added.
202.  HDMI 1.3 Video Interface   HDMI format released in 2006 with bitrate of 10.2 gigabytes per second. Deep Color supports 30-bit, 36-bit and 48-bit (RGB or YCbCr) color depths up from 24-bit) and New HD lossless audio formats, Dolby TrueHD and DTS-HD Master Audio.
203.  HIMEM     High Memory
204.  HP Company   Hewlett-Packard
205.  HPUX O/S   Hewlett-Packard Unix
206.  HQV Video   Hollywood Quality Video
207.  HS     High Speed
208.  HTML Software Language   HyperText Markup Language
209.  HTPC     Home Theater PC
210.  HTTP Protocol   HyperText Transfer Protocol. The transport protocol for the web running over port 80.
211.  Hz     Hertz
212.  IANA Internet IANA Internet Assigned Numbers Authority
213.  IBM Company   International Business Machines
214.  ICANN Organization   International Corporation for Assigned Names and Numbers
215.  ICMP Network   Internet Control Message Protocol, supports packets containing error, control, and informational messages.
216.  IDE     Imbedded Drive Electronics
217.  IEEE Organization   Institute of Electrical and Electronics Engineers
218.  IETF Organization   Internet Engineering Task Force Engineering Task Force
219.  IHV     Independent Hardware Vendor
220.  IIS   Microsoft Internet Information Server/Services Software Product
221.  IM     Instant Messenger
222.  IMAP Protocol   Interactive Mail Access Protocol
223.  IMG     Image
224.  IP Protocol   Internet Protocol
225.  IPL     Initial Program Load
226.  IPS Network   Intrusion Protection Systems
227.  IPSEC Protocol   Internet Protocol Security
228.  IR     Infrared
229.  IRDA     (IrDA)Infrared Data Association
230.  ISA   IBM Industry Standard Architecture (bus)
231.  ISCSI     (iSCSI) Internet SCSI
232.  ISO Organization   International Standards Organization
233.  ISP     Internet Service Provider
234.  ISV     Independent Software Vendor
235.  IT     Information Technology
236.  ITU Organization   International Telecommunication Union
237.  JAR Java   Java Archive (file format)
238.  JBOD     Just a Bunch of Disks drives. Independently connected with no RAID.
239.  JDK Java   Java Development Kit
240.  JEDEC Organization   Joint Electron Device Engineering Council, semiconductor engineering standardization body which sets PC memory standards.
241.  JIT     Just-In-Time
242.  JRE Java   Java Runtime Environment
243.  JSON Java   JavaScript Object Notation (lightweight data-interchange format with language bindings)
244.  JSON-RPC Java   A simple remote procedure call protocol similar to XML-RPC although it uses the lightweight JSON format instead of XML format.
245.  KB     Kilobyte (1,024 bytes)
246.  KBD     Keyboard
247.  Kbps     Kilobits Per Second
248.  KDE     K Desktop Environment (Linux)
249.  Kernel Linux   The kernel is the 'core' of the operating system. This program is the control program of hardware & software on a machine.
250.  Khz     Kilohertz
251.  KMD     Kernel-mode driver
252.  KVM     Keyboard, Video, Mouse (pc switch)
253.  L2TP Protocol   Layer Two Tunneling Protocol, used for VPN
254.  LACNIC Internet IANA Latin America and Caribbean Latin America and the Carribean
255.  LAMP     Linux, Apache, MySQL and PHP (open source development platform)
256.  LAN Network   Local Area Network
257.  LANG Software Language   Language
258.  LBA Storage   Logical Block Addressing, tops out at 2.1 terabytes
259.  LCD Display Technology   Liquid Crystal Display
260.  LDAP Authentication Protocol   Lightweight Directory Access Protocol, used for single point of user login authentication
261.  LED     Light Emitting Diode
262.  LF     Line Feed
263.  LIFO     Last In, First Out
264.  LILO     Last In, Last Out
265.  LISP Software Language   List Processing (Computer Language)
266.  LLBA Storage   Long Logical Block Addressing, exceeds the LBA 2.1 terabyte limit
267.  LPI     Lines Per Inch
268.  LPM     Lines Per Minute
269.  LPT1     First Parallel Printer Port
270.  LQ     Letter Quality
271.  LSI     Large Scale Integration
272.  LST     List
273.  LUN Storage   Logical Unit Number, an identifier of a SCSI logical unit.
274.  MAC address Network   Media Access Control address, a unique identifier number assigned to each network adapter
275.  MAPI   Microsoft Mail/Messaging Applications Programming Interface
276.  MB     Megabyte (1,024 kilobytes)
277.  MBASIC Software Language Microsoft Microsoft BASIC
278.  MBps     Megabytes Per Second
279.  MBR     Master Boot Record
280.  MCA   IBM Micro Channel Adapter/Architecture
281.  MCSD   Microsoft Microsoft Certified Systems Developer
282.  MCSE   Microsoft Microsoft Certified Systems Engineer
283.  MDI     Multiple Document Interface
284.  MEG     Megabyte (1,024 kilobytes)
285.  MEM Memory   Memory
286.  MFC   Microsoft Microsoft Foundation Class
287.  MGR     Manager
288.  MIDI     Musical Instrument Digital Interface
289.  MIMO Wireless Network   Multiple Input, Multiple Output
290.  MIPS     Million Instructions Per Second
291.  MISC     Miscellaneous
292.  MITM Security   man-in-the-middle, a form of active eavesdropping on a network.
293.  MLC Storage - SSD   Multi-Level Cell. Designed for quick read operations, but this technology is not suitable for high-speed write operations, especially random writes.
294.  MONO     Monaural
295.  MOSFET     Metal Oxide Semiconductor Field Effect Transistor
296.  MPAA Organization   Motion Picture Association of America
297.  MPEG     Moving Picture Experts Group
298.  MPIO Network Microsoft (MultiPath I/O) For load balancing and failover support in Microsoft Windows o/s.
299.  MRP     Manufacturing Resources Planning
300.  MSACCESS Database Microsoft MS Access Database.
301.  MSCDEX   Microsoft Microsoft Compact Disc Extensions
302.  MSCE   Microsoft Microsoft Certified Software Engineer
303.  MSCHAP Protocol Microsoft Microsoft Challenge Handshake Authentication Protocol
304.  MSDE   Microsoft Microsoft SQL Server Desktop Engine (will not run on Vista, Use SQL Server 2005 Express)
305.  MSDN   Microsoft Microsoft Developer Network
306.  MSG     Message
307.  MSI Company   Micro-Star International
308.  MSIE   Microsoft Microsoft Internet Explorer
309.  MSN   Microsoft Microsoft Network
310.  MSRP     Manufacturer Suggested Retail Price
311.  MSXML   Microsoft Microsoft XML
312.  MTBB     Mean Time Between Breakdowns
313.  MTBF Hardware   Mean Time Between Failures
314.  MTTF Hardware   Mean Time To Failures
315.  MTTR     Mean Time To Repair. The average time to carry out a repair.
316.  MTU Network   Maximum Transfer/Transmission Unit
317.  MUX     Multiplexer
318.  MV     Millivolt
319.  NAC Network   Network Access Control
320.  NAICS Standard   North American Industry Classification System. Developed jointly by USA, Canada and Mexico to classify business establishments.
321.  NAK     Negative Acknowledgment
322.  NAS Storage   Network Attached Storage, hard disk storage that is set up with its own network IP address rather than being attached to a department computer that is serving applications to a network's workstation users.
323.  NAT Network   Network Address Translation
324.  NCQ     Native Command Queuing. A hard drive can sort pending commands to minimize extra head travel for performace tuning.
325.  NDMP Network   Network Data Management Protocol
326.  NFS O/S File System   Network File System
327.  NIC Network   Network Interface Card
328.  NNTP Protocol   Network News Transfer Protocol
329.  NSA Organization   National Security Agency
330.  NTFS O/S File System Microsoft New Technology File System
331.  NTLDR   Microsoft New Technology Loader (Used at Boot Time)
332.  NTLM Authentication Protocol Microsoft NT LAN Manager. Microsoft authentication protocol used as an integrated single sign-on mechanism. Being replaced by kerberos.
333.  NVRAM Memory   Non-Volatile Random Access Memory
334.  O/E Accounting   Order Entry
335.  OASIS Organization   Organization for the Advancement of Structured Information Standards. International consortium manages all kinds of B2B XML initiates for open standards for content and data interchange.
336.  OCR     Optical Character Recognition
337.  ODBC     Object-Oriented Database Connectivity
338.  ODD Hardware   Optical Disc Drive
339.  ODF File Format   Open Document Format
340.  OEM     Original Equipment Manufacturer
341.  OLE Protocol Microsoft Object Linking and Embedding. Allows exchange of commands and data between two applications running simultaneously
342.  OLED Display Technology   Organic Light Emitting Diode. OLED televisions offer amazing high contrast ratios.
343.  Open XML   Microsoft Default document file format used in MS Office 2007.
344.  OS     Operating System
345.  OS/2 O/S IBM Operating System/2
346.  OWA Service Microsoft Outlook Web Access. A webmail service of Microsoft Exchange Server to access e-mail , calendars, contacts, tasks, and other mailbox contents when not having access to Outlook.
347.  P2P     Peer-to-Peer computer network
348.  P4   Intel Pentium 4 PC Desktop Processor
349.  PAB File Format   Personal Address Book
350.  PBX Phones   Private Branch Exchange
351.  PC     Personal Computer
352.  PCB Hardware   Printed Circuit Board
353.  PC-DOS O/S IBM Personal Computer - Disk Operating System
354.  PCI Interface   Peripheral Component Interconnect/Interface
355.  PCIe Interface   PCI Express interconnect architecture, lastest internal bus used in PCs.
356.  PCI-SIG Organization   PCI Special Interest Group. Organization who owns and manages PC PCI bus specifications.
357.  PCL Software Language HP Printer Command Language
358.  PCMCIA     Personal Computer Memory Card International Association
359.  PCRAM Memory   Phase Change Random Access Memory
360.  PDA Hardware   Personal Digital Assistant
361.  PDF File Format Adobe Portable Document Format
362.  PDP Hardware   Plasma Display Panel
363.  PDU Hardware   Power Distribution Unit
364.  PEAP Protocol   Protected Extensible Protocol. A very secure method to transmit authentication information such as passwords.
365.  PERC Hardware   Power Edge RAID Controller
366.  PGDN     Page Down
367.  PGM     Program
368.  PGP Encryption   Pretty Good Privacy (encryption software)
369.  PGUP     Page Up
370.  PIN     Personal Identification Number
371.  PKI Encryption   Public Key Infrastructure
372.  PMR     Perpendicular Magnetic Recording (new technology for hard drives)
373.  PNG File Format   Portable Network Graphics (Picture Format)
374.  PNP     Plug And Play
375.  PNRP Protocol   Peer Name Resolution Protocol
376.  PO Accounting   Purchase Order
377.  POE Network   Power over Ethernet
378.  POP3 Email   Post Office Protocol, Version 3
379.  POS     Point of Sale
380.  POTS Phones   Plain Old Telephone Service
381.  PPP Protocol   Point-to-Point Internet Protocol
382.  PPPOE Protocol   Point-to-Point Protocol Over Ethernet
383.  PPTP Protocol   Point-to-Point Tunneling Protocol
384.  PROC     Procedure
385.  PS/2 O/S IBM Programming System 2
386.  PSTN Phones   Public Switched Telephone Network.This refers to the analog telephone network that's very common in residential networks.
387.  PSU Hardware   Power Supply Unit
388.  PVR     Personal Video Recorder
389.  PWR     Power
390.  QA     Quality Assurance
391.  QC     Quality Control
392.  QIC Media   Quarter-Inch Cartridge
393.  QOS Protocol   Quality Of Service (IEEE 802.1p Network Protocol to efficiently handle time sensitive network packets.) )
394.  RAD     Rapid Application Development
395.  RADIUS Network   Remote Authentication Dial-In User Service
396.  RAID Storage - RAID   Redundant Arrays of Independent Disks
397.  RAID 0 Storage - RAID   2 or More Drives striped as a single disk array for increased performance, no data protection.
398.  RAID 1 Storage - RAID   2 Drives set up as mirorred copies, if 1 drive fails, the 2nd will take over.
399.  RAID 10 Storage - RAID   Data mirrored then striped across 4 or more drives. Great performance & data protection.
400.  RAID 5 Storage - RAID   Stripped parity on 3 or more drives. Ultimate data protection and performance balance.
401.  RAID 6 Storage - RAID   Stripped parity on 3 or more drives. Can handle a 2 drive failure with no data loss.
402.  RAM Memory   Random Access Memory
403.  RAS     Remote Access Service
404.  RCPT     Recipient
405.  RDBMS     Relational Database Management System
406.  REG     Register
407.  REN Phones   Ringer Equivalency Number. A number which represents the ringer loading effect on a phone line. A REN 1 represents the load of a single traditional telephone set ringing circuit.
408.  REQ     Request
409.  RFI     Radio Frequency Interference
410.  RFID     Radio Frequency Identification
411.  RIAA Organization   Recording Industry Association of America
412.  RIPE Internet IANA Network Coordination Centre (Europe and the Middle-East Region)
413.  RIR Internet IANA Regional Internet Registries (currently there are 5 worldwide)
414.  RJ-11 Phones   Jack for Telephone cable
415.  RJ-45 Network   Jack for Network cable
416.  RMA     Return Material Authorization
417.  RMS     Rights Management Services.
418.  RND     Random
419.  ROI Accounting   Return On Investment
420.  ROM Memory   Read Only Memory
421.  RPM     Revolutions Per Minute
422.  RSS Protocol   Really Simple Syndication (Protocol)
423.  RTM     Release to Manufacturing
424.  SAAS Web Services   Software as a Service
425.  SAN Storage   Storage/System Area Network (Large Storage). Used to create pools of storage capacity that can be shared by a number of servers.
426.  SAP     Second Audio Program
427.  SATA Interface   Serial Advanced Technology Attachment (Replaces EIDE)
428.  SATA AHCI     Advanced Host Controller Interface, is an open standard allows operating systems to communicate with Serial ATA controllers directly.
429.  SCO Company   Santa Cruz Operation
430.  SCSI Interface   Small Computer Systems Interface
431.  SD Memory Cards   Secure Digital. Based on the MultiMediaCard (MMC) format, SD 1.0 and 1.1 support up to 2gb. These devices are pre-formatted with FAT32 file system.
432.  SDHC Memory Cards   Secure Digital High Capacity. Based on the MultiMediaCard (MMC) format, can support capacities above 4gb. These devices are pre-formatted with FAT32 file system.
433.  SDRAM Memory   Synchronous Dynamic Random Access Memory.
434.  SGI Company   Silicon Graphics, Inc.
435.  SHA Encryption   Secure Hash Algorithm [NSA]
436.  SHTML Software Language   Server-Side Include HyperText Markup Language
437.  SKU     Stock Keeping Unit Number
438.  SLC Storage - SSD   Single-Level Cell.This technology is better than MLC flash but is also more expensive.
439.  SLIP Protocol   Serial Line Interface Protocol
440.  S-MIME     Secure MIME
441.  SMTP Protocol   Simple Mail Transfer Protocol
442.  SN     Serial Number
443.  SNMP Network   Simple Network Management Protocol
444.  SOA Methodology   service Oriented Architecture
445.  SOAP Web Services   Simple Object Access Protocol. An XML message content standard for calling Web services.
446.  SOC Hardware   System on chip. An entire computer on a single chip.
447.  SODIMM Memory   Small Outline Dual In-line Memory Modules. This is commonly used memory modules in notebook PCs.
448.  SOHO     Small Office/Home Office
449.  SPI Network   Stateful Packet Inspection
450.  SQL Software Language   Structured Query Language
451.  SQRT     Square Root
452.  SSA Storage   Serial Storage Architecture
453.  SSD Storage - SSD   Solid State Disk. A flash memory based device which replaces traditional hard drives.
454.  SSH Protocol   Secure Shell. Allows secure (encrypted and authenticated) connections between any two devices running SSH.
455.  SSID Network   Service Set Identifier
456.  SSL Network   Secure Socket Layer. Protocol to provide secure communication,
457.  SSL VPN VPN   Secure sockets layer VPN. VPN client without custom software, uses a Browser to provide the the VPN logic.
458.  SSO     Single Sign on
459.  SSTP VPN VPN   Secure Socket Tunneling Protocol. Microsoft’s new VPN for Longhorn Server and Vista operating system.
460.  TAPI     Telephony Applications Programming Interface
461.  TCO     Total Cost of Ownership
462.  TCP/IP Protocol   Transmission Control Protocol/Internet Protocol
463.  TDM Phones   Time Division Multiplexing. A processes of splitting one channel into two or more channels by using timed segments for transmission.
464.  TELCO     Telephone Company
465.  TFTP Protocol   Trivial File Transfer Protocol
466.  TKIP Protocol   Temporal Key Integrity Protocol
467.  TLD Internet IANA Top Level Domains. For example, '.com' or '.org'
468.  TTY Interface   Teletype, old serial interface.
469.  TWAIN     Technology Without Any Interesting Name (Connects Scanners to PC)
470.  TXT     Text
471.  UART Hardware   Universal Asynchronous Receiver/Transmitter
472.  UDDI Web Services   Universal Description, Discovery, and Integration. Allows for a catalog of web services.
473.  UDI Video Interface   Unified Display Interface.
474.  UDMA Memory   Ultra Direct Memory Access
475.  UEFI Hardware   Unified Extensible Firmware Interface. Pc bios replacement which provides the interface that takes care of handing over the pre-boot environment to the operating system.
476.  UHF     Ultra-High Frequency
477.  UL Organization   Underwriters Laboratories
478.  UMPC Hardware   Ultra-Mobile PC. Hand-Held PCs with full capability for places where a laptop is too big or clunky.
479.  UNC     Universal Naming Convention
480.  UNIX O/S   AT&T Bell Laboratories Operating System
481.  UPS Hardware   Uninterruptible Power Supply
482.  URL Network   Uniform Resource Locator (website address)
483.  USB Interface Intel Universal Serial Bus
484.  UTP     Unshielded Twisted-Pair (cable)
485.  UUCP Protocol   Unix-To-Unix Copy Protocol
486.  UV Database IBM IBM Universe Data Base System
487.  UWB Frequency   Ultra-Wide Band
488.  VAR     Value Added Reseller
489.  VB Software Language Microsoft Visual Basic
490.  VBA Software Language Microsoft Visual Basic for Applications
491.  VCR     Video Cassette Recorder
492.  VER     Version
493.  VESA Organization   Video Electronics Standards Association
494.  VFS     Virtual File System
495.  VGA Video Interface   Video Graphic Array
496.  VHD     Virtual Hard Drive
497.  VHF Frequency   Very-High Frequency
498.  VLAN Network   Virtual Local Area Network. Uses IEEE 802.1q VLAN tagging to segregate traffic into isolated zones for secure access. Enables a physical network to be divided into logical separate and independent networks at Layer 2.
499.  VL-BUS Hardware Bus   Vesa Local-Bus [VESA]
500.  VM     Virtual Machine
501.  VOD     Video on Demand
502.  VOIP Phones   Voice Over Internet Protocol. A technology for transporting voice data packets through the internet.
503.  VPN Network   Virtual Private Network. Provides a secure way for telecommuters who take work home to connect to the company's local area network and access the resources they need.
504.  VS     Virtual Storage
505.  WAN Network   Wide Area Network
506.  WAP Wireless Network   Wireless Application Protocol
507.  WDL   Microsoft Windows Driver Library
508.  WEP Encryption   Wired Equivalent Privacy encryption algorithm. The original wireless network security with some security issues.
509.  WIKI     Wikipedia (online encylopedia) on the web.
510.  WIMAX Network   Worldwide Interoperability for Microwave Access. Based on the 802.16e-2005 standard, this new high speed wireless used by many cities. WiMAX is designed to be a point-to-point protocol over very long distances and can compete with DSL or cable for the for last mile access.
511.  WINSOCK Network Microsoft Windows Sockets, specifies how windows network accesses TCP/IP services
512.  WLAN Network   Wireless Local Area Network
513.  WMC     Windows Media Connect
514.  WPA Encryption   Wi-Fi Protected Access Protocol. Interim standard adopted as a replacement for "WEP" while the IEEE 802.11i standard was being ratified.
515.  WPA2 Encryption   Wi-Fi Protected Access Protocol. IEEE 802.11i standard specifying security protocol for wireless networks replaces "WPA" and now uses the Advanced Encryption Standard (AES) for encryption.
516.  WPF     Windows Presentation Foundation, new graphics subsystem
517.  WSDL Web Services   Web Services Description Language. An XML format for defining Web Service interfaces such as service name, inputs, output and connection information.
518.  WUSB Wireless   Wireless USB interface. Uses (UWB) Ultra-Wideband operating in the 3.1 to 10.6 ghz frequency range for distances as far as 10 meters to connect PC peripherals.
519.  WYSIWYG     What You See Is What You Get
520.  XBRL Software Language   Extensible Business Reporting Language
521.  Xeon Hardware Intel Xeon Server Processor Chip
522.  XML Software Language   Extensible Markup Language
523.  XPS File Format Microsoft XML Paper Specification. Microsoft Standard Document Format to compete with Adove PDF. Technology uses XML to describe data inside a zip compressed file.
524.  XSL Software Language   Extensible Stylesheet Language
525.  XSLT Software Language   Extensible Stylesheet Language Transformation
526.  Y2K     Year 2000
527.  YTD Accounting   Year To Date
528.  ZIF Hardware   Zero-Insertion Force (socket used for processors)
529.  ZIP File Compression   Compressed File (file name extension)
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