Comptia A+ Acronyms 702

Front 1

AC

Back 1

Alternating Current

Hint 1

Alternating Current - The movement of electric charge periodically reverses direction.

Front 2

ACPI

Back 2

Advanced Configuration and Power Interface

Hint 2

Advanced Configuration and Power Interface - An open industry standard developed by Intel, Microsoft, and Toshiba for configuration and power management.

Front 3

ACT

Back 3

Activity

Hint 3

Activity - An action or task.

Front 4

ADF

Back 4

Automatic Document Feeder

Hint 4

Automatic Document Feeder - A feature which takes several pages and feeds the paper one page at a time into a scanner or copier, allowing the user to scan, and thereby copy, print, or fax, multiple-page documents without having to manually replace each page.

Front 5

ADSL

Back 5

Asymmetric Digital Subscriber Line

Hint 5

Asymmetric Digital Subscriber Line - A form of Digital Subscriber Line in which the bandwidth available for downstream connection is significantly larger then for upstream. Although designed to minimise the effect of crosstalk between the upstream and downstream channels this setup is well suited for web browsing and client-server applications as well as for some emerging applications such as video on demand.

Front 6

AGP

Back 6

Accelerated Graphics Port

Hint 6

Accelerated Graphics Port - A bus specification by Intel which gives low-cost 3D graphics cards faster access to main memory on personal computers than the usual PCI bus.

Front 7

AMD

Back 7

Advanced Micro Devices

Hint 7

Advanced Micro Devices - A US manufacturer of integrated circuits, founded in 1969. AMD was the fifth-largest IC manufacturer in 1995. AMD focuses on the personal and networked computation and communications market. They produce microprocessors, embedded processors and related peripherals, memories, programmable logic devices, circuits for telecommunications and networking applications.

Front 8

APIPA

Back 8

Automatic Private Internet Protocol Addressing

Hint 8

Automatic Private Internet Protocol Addressing - A DHCP failover mechanism for local networks. With APIPA, DHCP clients can obtain IP addresses when DHCP servers are non-functional. APIPA exists in all modern versions of Windows except Windows NT.

Front 9

APM

Back 9

Advanced Power Management

Hint 9

Advanced Power Management - A feature of some displays, usually but not always, on laptop computers, which turns off power to the display after a preset period of inactivity to conserve electrical power. Monitors with this capability are usually refered to as "green monitors", meaning environmentally friendly.

Front 10

ARP

Back 10

Address Resolution Protocol

Hint 10

Address Resolution Protocol - A telecommunications protocol used for resolution of network layer addresses into link layer addresses, a critical function in multiple-access networks. ARP was defined by RFC 826 in 1982. It is Internet Standard STD 37. It is also the name of the program for manipulating these addresses in most operating systems.

Front 11

ASR

Back 11

Automated System Recovery

Hint 11

Automated System Recovery - A feature of the Windows XP operating system that can be used to simplify recovery of a computer's system or boot volumes. ASR consists of two parts: an automated backup, and an automated restore. The backup portion can be accessed in the Backup utility under System Tools.

Front 12

ATA

Back 12

Advanced Technology Attachment

Hint 12

Advanced Technology Attachment - An interface standard for the connection of storage devices such as hard disks, solid-state drives, floppy drives, and optical disc drives in computers.

Front 13

ATAPI

Back 13

Advanced Technology Attachment Packet Interface

Hint 13

Advanced Technology Attachment Packet Interface - Part of the EIDE interface that provides additional commands to control a CD-ROM drive or magnetic tape.

Front 14

ATM

Back 14

Asynchronous Transfer Mode

Hint 14

Asynchronous Transfer Mode - A method for the dynamic allocation of bandwidth using a fixed-size packet.

Front 15

ATX

Back 15

Advanced Technology Extended

Hint 15

Advanced Technology Extended - A motherboard form factor specification developed by Intel in 1995 to improve on previous de facto standards like the AT form factor.

Front 16

BHO

Back 16

Browser Helper Object

Hint 16

Browser Helper Object - A DLL module designed as a plugin for Microsoft's Internet Explorer web browser to provide added functionality.

Front 17

BIOS

Back 17

Basic Input/Output System

Hint 17

Basic Input/Output System - The part of the system software of the IBM PC and compatibles that provides the lowest level interface to peripheral devices and controls the first stage of the bootstrap process, including installing the operating system. The BIOS is stored in ROM, or equivalent, in every PC. Its main task is to load and execute the operating system which is usually stored on the computer's hard disk, but may be loaded from CD-ROM or floppy disk at install time.

Front 18

BNC

Back 18

Bayonet-Neill-Concelman
- or -
British Naval Connector

Hint 18

Bayonet-Neill-Concelman/British Naval Connector - A connector for coaxial cable such as that used for some video connections and RG58 "cheapernet" connections. A BNC connector has a bayonet-type shell with two small knobs on the female connector which lock into spiral slots in the male connector when it is twisted on.

Front 19

BTX

Back 19

Balanced Technology Extended

Hint 19

Balanced Technology Extended - A form factor for motherboards, originally intended to be the replacement for the aging ATX motherboard form factor in late 2004 and early 2005. It was designed to alleviate some of the issues that arose from using newer technologies (which often demand more power and create more heat) on motherboards compliant with the circa-1996 ATX specification.

Front 20

CD

Back 20

Compact Disc

Hint 20

Compact Disc - A 4.72 inch disc developed by Sony and Philips that can store, on the same disc, still and/or moving images in monochrome and/or color; stereo or two separate sound tracks integrated with and/or separate from the images; and digital program and information files.

Front 21

CD-ROM

Back 21

Compact Disc-Read-Only Memory

Hint 21

Compact Disc-Read-Only Memory - A non-volatile optical data storage medium using the same physical format as audio compact discs, readable by a computer with a CD-ROM drive. CD-ROM is popular for distribution of large databases, software and especially multimedia applications. The maximum capacity is about 600 megabytes. A CD can store around 640 megabytes of data - about 12 billion bytes per pound weight.

Front 22

CD-RW

Back 22

Compact Disc-Rewritable

Hint 22

Compact Disc-Rewritable - A rewritable version of CD-ROM. A CD-RW drive can write about 650 megabytes of data to CD-RW media an unlimited number of times. Most CD-RW drives can also write once to CD-R media.

Front 23

CDFS

Back 23

Compact Disc File System

Hint 23

Compact Disc File System - A file system for read-only and write-once CDROMs developed by Simson Garfinkel and J. Spencer Love at the MIT Media Lab between 1985 and 1986. The file system provided for the creation, modification, renaming and deletion of files and directories on a write-once media. The file system was developed with a write-once CDROM simulator and was used to master one of the first CDROMs in 1986

Front 24

CFS

Back 24

Central File System
- or -
Common File System
- or -
Command File System

Hint 24

Central File System/Common File System/Command File System - Houses records that are of common interest or value to many employees or job functions in ONE AREA of the office suite. The files are conveniently accessible to those people. That one location is (ideally) under the control of one supervisor

Front 25

CMOS

Back 25

Complementary Metal-Oxide Semiconductor

Hint 25

Complementary Metal-Oxide Semiconductor - A semiconductor fabrication technology using a combination of n- and p-doped semiconductor material to achieve low power dissipation. Any path through a gate through which current can flow includes both n and p type transistors. Only one type is turned on in any stable state so there is no static power dissipation and current only flows when a gate switches in order to charge the parasitic capacitance.

Front 26

COMx

Back 26

Communication Port (x = Port Number)

Hint 26

Communication Port (x = Port Number) - An application-specific or process-specific software construct serving as a communications endpoint in a computer's host operating system.

Front 27

CPU

Back 27

Central Processing Unit

Front 28

CRT

Back 28

Cathode-Ray Tube

Front 29

DAC

Back 29

Discretionary Access Control

Front 30

DB-25

Back 30

25-pin D-shell connector

Front 31

DB-9

Back 31

9-pin D-shell connector

Front 32

DC

Back 32

Direct Current

Front 33

DDoS

Back 33

Distributed Denial of Service
- or -
Dynamic Denial of Service

Front 34

DDR

Back 34

Double Data Rate

Front 35

DDR RAM

Back 35

Double Data Rate Random Access Memory

Front 36

DDR SDRAM

Back 36

Double Data Rate Synchronous Dynamic Random Access Memory

Front 37

DFS

Back 37

Distributed File System

Front 38

DHCP

Back 38

Dynamic Host Configuration Protocol

Front 39

DIMM

Back 39

Dual In-line Memory Module

Hint 39

Dual In-line Memory Module -

Front 40

DIN

Back 40

Deutsche Industrie Norm

Front 41

DIP

Back 41

Dual In-line Package

Hint 41

Dual In-iine Package -

Front 42

DLT

Back 42

Digital Light Tape

Front 43

DMA

Back 43

Direct Memory Access

Front 44

DMZ

Back 44

Demilitarized Zone

Front 45

DNS

Back 45

Domain Name Service
- or -
DOmain Name Server

Front 46

DoS

Back 46

Denial of Service

Front 47

DRAM

Back 47

Dynamic Random Access Memory

Front 48

DSL

Back 48

Digital Subscriber Line

Front 49

DVD

Back 49

Digital Video Disc
- or -
Digital Versatile Disc

Front 50

DVD-RAM

Back 50

Digital Video Disc-Random Access Memory
- or -
Digital Versatile Disc-Random Access Memory

Front 51

DVD-ROM

Back 51

Digital Video Disc-Read Only Memory
- or -
Digital Versatile Disc-Read Only Memory

Front 52

DLP

Back 52

Digital Light Processing

Front 53

DVD-R

Back 53

Digital Video Disc-Recordable
- or -
Digital Versatile Disc-Recordable

Front 54

DVD-RW

Back 54

Digital Video Disc-Rewritable
- or -
Digital Versatile Disc-Rewritable

Front 55

DVI

Back 55

Digital Visual Interface

Front 56

ECC

Back 56

Error Correction Code

Front 57

ECP

Back 57

Extended Capabilities Port

Front 58

EEPROM

Back 58

Electrically Erasable Programmable Read-Only Memory

Front 59

EFS

Back 59

Encrypting File System

Front 60

EIDE

Back 60

Enhanced Integrated Drive Electronics

Front 61

EMI

Back 61

Electromagnetic Interference

Front 62

EMP

Back 62

Electromagnetic Pulse

Front 63

EPROM

Back 63

Erasable Programmable Read-Only Memory

Front 64

EPP

Back 64

Enhanced Parallel Port

Front 65

ERD

Back 65

Emergency Repair Disk

Front 66

ESD

Back 66

Electrostatic Discharge

Front 67

EVGA

Back 67

Extended Video Graphics Adapter
- or -
Extended Video Graphics Array

Front 68

EVDO

Back 68

Evolution Data Optimized
- or -
Evolution Data Only

Front 69

FAT

Back 69

File Allocation Table

Front 70

FAT12

Back 70

12-Bit File Allocation Table

Front 71

FAT16

Back 71

16-Bit File Allocation Table

Front 72

FAT32

Back 72

32-Bit File Allocation Table

Front 73

FDD

Back 73

Floppy Disk Drive

Front 74

Fn

Back 74

Function
(Referring to the "Function Key" on a laptop)

Front 75

FPM

Back 75

Fast Page-Mode

Front 76

FRU

Back 76

Field Replaceable Unit

Front 77

FSB

Back 77

Front Side Bus

Front 78

FTP

Back 78

File Transfer Protocol

Front 79

FQDN

Back 79

Fully Qualified Domain Name

Front 80

Gb

Back 80

Gigabit

Front 81

GB

Back 81

Gigabyte

Front 82

GDI

Back 82

Graphics Device Interface

Front 83

GHz

Back 83

Gigahertz

Front 84

GUI

Back 84

Graphical User Interface

Front 85

GPS

Back 85

Global Positioning System

Front 86

GSM

Back 86

Global System for Mobile Communications

Front 87

HAL

Back 87

Hardware Abstraction Layer

Front 88

HCL

Back 88

Hardware Compatibility List

Front 89

HDD

Back 89

Hard Disk Drive

Front 90

HDMi

Back 90

High Definition Media Interface

Front 91

HPFS

Back 91

High Performance File System

Front 92

HTML

Back 92

Hypertext Markup Language

Front 93

HTTP

Back 93

Hypertext Transfer Protocol

Front 94

HTTPS

Back 94

Hypertext Transfer Protocol Over Secure Sockets Layer

Front 95

I/O

Back 95

Input/Output

Front 96

ICMP

Back 96

Internet Control Message Protocol

Front 97

ICR

Back 97

Intelligent Character Recognition

Front 98

IDE

Back 98

Integrated Drive Electronics

Front 99

IDS

Back 99

Intrusion Detection System

Front 100

IEEE

Back 100

Institute of Electrical and Electronics Engineers

Front 101

IIS

Back 101

Internet Information Service

Front 102

IMAP

Back 102

Internet Mail Access Protocol

Front 103

IP

Back 103

Internet Protocol

Front 104

IPCONFIG

Back 104

Internet Protocol Configuration

Front 105

IPP

Back 105

Internet Printing Protocol

Front 106

IPSEC

Back 106

Internet Protocol Security

Front 107

IPX

Back 107

Internetwork Packet Exchange

Front 108

SPX

Back 108

Sequenced Packet Exchange

Front 109

IR

Back 109

Infrared

Front 110

IrDA

Back 110

Infrared Data Association

Front 111

IRQ

Back 111

Interrupt Request

Front 112

ISA

Back 112

Industry Standard Architecture

Front 113

ISDN

Back 113

Integrated Service Digital Network

Front 114

ISO

Back 114

Industry Standards Organization

Front 115

ISP

Back 115

Internet Service Provider

Front 116

JBoD

Back 116

Just a Bunch of Disks

Front 117

Kb

Back 117

Kilobit

Front 118

KB

Back 118

Kilobyte
- or -
Knowledge Base

Front 119

LAN

Back 119

Local Area Network

Front 120

LBA

Back 120

Logical Block Addressing

Front 121

LC

Back 121

Lucent Connector

Front 122

LCD

Back 122

Liquid Crystal Display

Front 123

LDAP

Back 123

Lightweight Directory Access Protocol

Front 124

LED

Back 124

Light Emitting Diode

Front 125

Li-on

Back 125

Lithium-ion Daemon

Front 126

LPD

Back 126

Line Printer Daemon

Front 127

LPR

Back 127

Line Printer Remote

Front 128

LPT

Back 128

Line Printer Terminal

Front 129

LPT1

Back 129

Line Printer Terminal 1

Front 130

LVD

Back 130

Low Voltage Differential

Front 131

MAC

Back 131

Media Access Control
- or -
Mandatory Access Control

Front 132

MAPI

Back 132

Messaging Application Programming Interface

Front 133

MAU

Back 133

Media Access Unit
- or -
Media Attachment Unit

Front 134

Mb

Back 134

Megabit

Front 135

MB

Back 135

Megabyte

Front 136

MBR

Back 136

Master Boot Record

Front 137

MBSA

Back 137

Microsoft Baseline Security Analyzer

Front 138

MFD

Back 138

Multifunction Device

Front 139

MFP

Back 139

Multifunction Product

Front 140

MHz

Back 140

Megahertz

Front 141

MicroDIMM

Back 141

Micro Dual In-line Memory Module

Hint 141

Micro Dual In-line Memory Module -

Front 142

MIDI

Back 142

Musical Instrument Digital Interface

Front 143

MIME

Back 143

Multipurpose Internet Mail Extension

Front 144

MMC

Back 144

Microsoft Management Console

Front 145

MMX

Back 145

Multimedia Extensions

Front 146

MP3

Back 146

Moving Picture Experts Group Layer 3 Audio

Front 147

MP4

Back 147

Moving Picture Experts Group Layer 4

Front 148

MPEG

Back 148

Moving Picture Experts Group

Front 149

MSCONFIG

Back 149

Microsoft Configuration

Front 150

MSDS

Back 150

Material Safety Data Sheet

Front 151

MUI

Back 151

Multilingual User Interface

Front 152

NAC

Back 152

Network Access Control

Front 153

NAS

Back 153

Network-Attached Storage

Front 154

NAT

Back 154

Network Address Translation

Front 155

NetBIOS

Back 155

Networked Basic Input/Output System

Front 156

NetBEUI

Back 156

Networked Basic Input/Output System Extended User Interface

Front 157

NIC

Back 157

Network Interface Card

Front 158

Ni-Cd

Back 158

Nickel Cadmium

Front 159

NiMH

Back 159

Nickel Metal Hydride

Front 160

NLX

Back 160

New Low-profile Extended

Front 161

NNTP

Back 161

Network News Transfer Protocol

Front 162

NTFS

Back 162

New Technology File System

Front 163

NTLDR

Back 163

New Technology Loader

Front 164

NTP

Back 164

Network Time Protocol

Front 165

OCR

Back 165

Optical Character Recognition

Front 166

ODBC

Back 166

Open Database Connectivity

Front 167

OEM

Back 167

Original Equipment Manufacturer

Front 168

OS

Back 168

Operating System

Front 169

PAN

Back 169

Personal Area Network

Front 170

PATA

Back 170

Parallel Advanced Technology

Front 171

PC

Back 171

Personal Computer

Front 172

PCI

Back 172

Peripheral Component Interconnect

Front 173

PCIe

Back 173

Peripheral Component Interconnect Express

Front 174

PCIX

Back 174

Peripheral Component Interconnect Extended

Front 175

PCL

Back 175

Printer Control Language

Front 176

PCMCIA

Back 176

Personal Computer Memory Card International Association

Front 177

PDA

Back 177

Personal Digital Assistant

Front 178

PGA

Back 178

Pin Grid Array

Front 179

PGA2

Back 179

Pin Grid Array 2

Front 180

PIN

Back 180

Personal Identification Number

Front 181

PKI

Back 181

Public Key Infrastructure

Front 182

PnP

Back 182

Plug and Play

Front 183

POP3

Back 183

Post Office Protocol 3

Front 184

POST

Back 184

Power-on Self Test

Front 185

POTS

Back 185

Plain Old Telephone Service

Front 186

PPP

Back 186

Point-to-point Protocol

Front 187

PPTP

Back 187

Point-to-point Tunneling Protocol

Front 188

PRI

Back 188

Primary Rate Interface

Front 189

PROM

Back 189

Programmable Read-only Memory

Front 190

PS/2

Back 190

Personal System/2 Connector

Front 191

PSTN

Back 191

Public Switched Telephone Network

Front 192

PSU

Back 192

Power Supply Unit

Front 193

PVC

Back 193

Permanent Virtual Circuit

Front 194

PXE

Back 194

Preboot Execution Environment
- or -
Pre-Execution Environment

Front 195

QoS

Back 195

Quality of Service

Front 196

RAID

Back 196

Redundant Array of Independent Discs
- or -
Redundant Array of Inexpensive Discs

Front 197

RAM

Back 197

Random Access Memory

Front 198

RAS

Back 198

Remote Access Service

Front 199

RDRAM

Back 199

RAMBUS® Dynamic Random Access Memory

Front 200

RF

Back 200

Radio Frequency

Front 201

RFI

Back 201

Radio Frequency Interference

Front 202

RGB

Back 202

Red Green Blue

Front 203

RIMM

Back 203

RAMBUS® In-line Memory Module

Hint 203

RAMBUS® In-line Memory Module -

Front 204

RIP

Back 204

Routing Information Protocol

Front 205

RIS

Back 205

Remote Installation Service

Front 206

RISC

Back 206

Reduced Instruction Set Computer

Front 207

RJ

Back 207

Registered Jack

Front 208

RJ-11

Back 208

Registered Jack Function 11

Front 209

RJ-45

Back 209

Registered Jack Function 45

Front 210

RMA

Back 210

Returned Materials Authorization

Front 211

ROM

Back 211

Read-only Memory

Front 212

RS-232
- or -
RS-232C

Back 212

Recommended Standard 232

Front 213

RTC

Back 213

Real-time Clock

Front 214

SAN

Back 214

Storage Area Network

Front 215

SATA

Back 215

Serial Advanced Technology Attachment

Front 216

SC

Back 216

Subscription Channel

Front 217

SCP

Back 217

Secure Copy Protection

Front 218

SCSI

Back 218

Small Computer System Interface

Front 219

SCSI ID

Back 219

Small Computer System Interface Identifier

Front 220

SD Card

Back 220

Secure Digital Card

Front 221

SDRAM

Back 221

Synchronous Dynamic Random Access Memory

Front 222

SEC

Back 222

Single Edge Connector

Front 223

SFC

Back 223

System File Checker

Front 224

SGRAM

Back 224

Synchronous Graphics Random Access Memory

Front 225

SIMM

Back 225

Single In-line Memory Module

Hint 225

Single In-line Memory Module

Front 226

SLI

Back 226

Scalable Line Interface
- or -
System Level Integration
- or -
Scanline Interleave Mode

Front 227

S.M.A.R.T.

Back 227

Self-monitoring, Analysis, and Reporting Technology

Hint 227

Self-monitoring, Analysis, and Reporting Technology - A monitoring system for computer hard disk drives to detect and report on various indicators of reliability, in the hope of anticipating failures.

Front 228

SMB

Back 228

Server Message Block

Hint 228

Server Message Block - Operates as an application-layer network protocol mainly used for providing shared access to files, printers, serial ports, and miscellaneous communications between nodes on a network.

Front 229

SMTP

Back 229

Simple Mail Transport Protocol

Hint 229

Simple Mail Transport Protocol - An Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks.

Front 230

SNMP

Back 230

Simple Network Management Protocol

Hint 230

Simple Network Management Protocol - An "Internet-standard protocol for managing devices on IP networks." Devices that typically support SNMP include routers, switches, servers, workstations, printers, modem racks, and more

Front 231

SO-DIMM

Back 231

Small Outline Dual Inline Memory Module

Hint 231

Small Outline Dual In-line Memory Module - A smaller kind of DIMM with 72 pins (supporting 32-bit transfers) or 144 pins (64-bit transfers). Regular DIMMs have 168 pins and support 64-bit transfers. Being roughly half the size of the regular DIMM, SO-DIMMs are often used in notebook computers.

Front 232

SOHO

Back 232

Small Office/Home Office

Hint 232

Small Office/Home Office - Category of business or cottage industry that involves from 1 to 10 workers.

Front 233

SP

Back 233

Service Pack

Hint 233

Service Pack - A collection of updates, fixes or enhancements to a software program delivered in the form of a single installable package. Many companies, such as Microsoft or Autodesk, typically release a service pack when the number of individual patches to a given program reaches a certain (arbitrary) limit.

Front 234

S/PDIF

Back 234

Sony/Philips Digital Interconnect Format
- or -
Sony Philips Digital Interface

Hint 234

Sony/Philips Digital Interconnect Format - A digital audio interconnect used in consumer audio equipment over relatively short distances.

Front 235

SPGA

Back 235

Staggered Pin Grid Array

Hint 235

Staggered Pin Grid Array - A style of integrated circuit socket or pin-out with a staggered grid of pins around the edge of the socket, positioned as several squares, one inside the other.

Front 236

SPX

Back 236

Sequenced Packet Exchange

Hint 236

Sequenced Packet Exchange - A transport layer protocol built on top of IPX. SPX is used in Novell NetWare systems for communications in client/server application programs.

Front 237

SRAM

Back 237

Static Random Access Memory

Hint 237

Static Random Access Memory - A type of semiconductor memory that uses bistable latching circuitry to store each bit.

Front 238

SSH

Back 238

Secure Shell

Hint 238

Secure Shell - A network protocol for secure data communication, remote shell services or command execution and other secure network services between two networked computers that it connects via a secure channel over an insecure network

Front 239

SSID

Back 239

Service Set Identifier

Hint 239

Service Set Identifier - A 32-character unique identifier that distinguishes one wireless network from another. All devices attempting to connect to a specific network use the same SSID, which appears in the header of packets. Because an SSID can be intercepted, it does not supply any security to the network.

Front 240

SSL

Back 240

Secure Socket Layer

Hint 240

Secure Socket Layer - Cryptographic protocol that provide communication security over the Internet. It encrypts the segments of network connections at the Transport Layer, using asymmetric cryptography for key exchange, symmetric encryption for privacy, and message authentication codes for message integrity.

Front 241

ST

Back 241

Straight Tip

Hint 241

Straight Tip - The sides of the ceramic tip are parallel. Multimode, rarely single-mode; Angle-polished connections (APC) not possible.

Front 242

STP

Back 242

Shielded Twisted Pair

Hint 242

Shielded Twisted Pair - A cable defined by the IBM Cabling System specifications and used with token ring or FDDI networks. This type of shielding protects cable from external EMI from entering or exiting the cable and also protects neighboring pairs from crosstalk

Front 243

SVGA

Back 243

Super Video Graphics Array

Hint 243

Super Video Graphics Array - A broad term that covers a wide range of computer display standards. Refers to a resolution of 800 × 600 pixels.

Front 244

SXGA

Back 244

Super Extended Graphics Array

Hint 244

Super Extended Graphics Array - A standard monitor resolution of 1280×1024 pixels. This display resolution is the "next step" above the XGA resolution that IBM developed in 1990.

Front 245

TB

Back 245

Terabyte

Hint 245

Terabyte - 1,099,511,627,776 bytes = 1024 gigabytes

Front 246

TCP

Back 246

Transmission Control Protocol

Hint 246

Transmission Control Protocol - Most common transport layer protocol used on Ethernet and the Internet. It was developed by DARPA.

Front 247

TCP/IP

Back 247

Transmission Control Protocol/Internet Protocol

Hint 247

Transmission Control Protocol/Internet Protocol - The de facto standard Ethernet protocols incorporated into 4.2BSD Unix. TCP/IP was developed by DARPA for internetworking and encompasses both network layer and transport layer protocols. While TCP and IP specify two protocols at specific protocol layers, TCP/IP is often used to refer to the entire DoD (Department of Defense) protocol suite based upon these, including telnet, FTP, UDP and RDP.

Front 248

TDR

Back 248

Time-domain Reflectometer

Hint 248

Time-domain Reflectometer - An electronic instrument used to characterize and locate faults in metallic cables.

Front 249

TFTP

Back 249

Trivial File Transfer Protocol

Hint 249

Trivial File Transfer Protocol - A simple file transfer protocol used for down-loading boot code to diskless workstations.

Front 250

UAC

Back 250

User Account Control

Hint 250

User Account Control - A security infrastructure that reduces the possibility of lower-privilege applications communicating with higher-privilege ones until an administrator authorizes an increase or elevation.

Front 251

UART

Back 251

Universal Asynchronous Receiver Transmitter

Hint 251

Universal Asynchronous Receiver Transmitter - An integrated circuit used for serial communications, containing a transmitter (parallel-to-serial converter) and a receiver (serial-to-parallel converter), each clocked separately

Front 252

UDF

Back 252

User Defined Functions
- or -
Universal Disk Format
- or -
Universal Data Format

Hint 252

User Defined Function - functions provided by the user of a program or environment, in a context where the usual assumption is that functions are built into the program or environment.

Universal Disk Format - A CD-ROM file system standard that is required for DVD ROMs. UDF is the OSTA's replacement for the ISO 9660 file system used on CD-ROMs, but will be mostly used on DVD. DVD multimedia disks use UDF to contain MPEG audio and video streams.

Universal Data Format - A superset of data formats used with GIS, imaging, mapping, and CAD products. You can access data in UDF format instead of converting it from one format to another, with full geographic information preserved.

Front 253

UDMA

Back 253

Ultra Direct Memory Access

Hint 253

Ultra Direct Memory Access - An interface that was the fastest method used to transfer data between the computer (through the ATA controller) and an ATA device until Serial ATA.

Front 254

UDP

Back 254

User Datagram Protocol

Hint 254

User Datagram Protocol - Internet standard network layer, transport layer and session layer protocols which provide simple but unreliable datagram services.

Front 255

UNC

Back 255

Universal Naming Convention

Hint 255

Universal Naming Convention - The type of file system path used in Microsoft Windows networking to completely specify a directory on a file server.

Front 256

UPS

Back 256

Uninterruptible power supply

Hint 256

Uninterruptible power supply - A battery powered power supply unit that is guaranteed to provide power to a computer in the event of interruptions in the incoming mains electrical power.

Front 257

URL

Back 257

Uniform Resource Locator

Hint 257

Uniform Resource Locator - A standard way of specifying the location of an object, typically a web page, on the Internet.

Front 258

USB

Back 258

Universal Serial Bus

Hint 258

Universal Serial Bus - An external peripheral interface standard for communication between a computer and external peripherals over an inexpensive cable using biserial transmission.

Front 259

USMT

Back 259

User State Migration Tool

Hint 259

User State Migration Tool - A Microsoft command line utility program intended to allow advanced users, comfortable with Scripting language, to transfer files and settings between PCs.

Front 260

UTP

Back 260

Unshielded Twisted Pair

Hint 260

Unshielded Twisted Pair - Normal telephone wire (in the USA). It may be used for computer to computer communications, e.g. using a version of Ethernet or localtalk. It is much cheaper than standard "full-spec" Ethernet cable.

Front 261

UXGA

Back 261

Ultra Extended Graphics Array

Hint 261

Ultra Extended Graphics Array - A display mode in which the resolution is 1600 pixels horizontally by 1200 pixels vertically (1600 x 1200). This amounts to a total of 1,920,000 pixels on the screen.

Front 262

VESA

Back 262

Video Electronics Standards Association

Hint 262

Video Electronics Standards Association - An international standards body for computer graphics founded in 1989 by NEC Home Electronics and eight other video display adapter manufacturers.

Front 263

VFAT

Back 263

Virtual File Allocation Table

Hint 263

Virtual File Allocation Table - Method to store long file names in the existing FAT file systems without altering their data structures.

Front 264

VGA

Back 264

Video Graphics Array

Hint 264

Video Graphics Array - A display standard for IBM PCs, with 640 x 480 pixels in 16 colours and a 4:3 aspect ratio.

Front 265

VoIP

Back 265

Voice over Internet Protocol

Hint 265

Voice over Internet Protocol - Any technology providing voice telephony services over IP, including CODECs, streaming protocols and session control. The major advantage of VoIP is lower cost, by avoiding dedicated voice circuits.

Front 266

VPN

Back 266

Virtual Private Network

Hint 266

Virtual Private Network - The use of encryption in the lower protocol layers to provide a secure connection through an otherwise insecure network, typically the Internet. VPNs are generally cheaper than real private networks using private lines but rely on having the same encryption system at both ends.

Front 267

VRAM

Back 267

Video Random-access Memory

Hint 267

Video Random-access Memory - Fast memory designed for storing the image to be displayed on a computer's monitor. VRAM may be built from special memory integrated circuits designed to be accessed sequentially.

Front 268

WAN

Back 268

Wide Area Network

Hint 268

Wide Area Network - A telecommunication network that covers a broad area (Example: Any network that links across metropolitan, regional, or national boundaries).

Front 269

WAP

Back 269

Wireless Application Protocol

Hint 269

Wireless Application Protocol - An open international standard for applications that use wireless communication. (Example: Internet access from a mobile phone.)

Front 270

WEP

Back 270

Wired Equivalent Privacy

Hint 270

Wired Equivalent Privacy - A security algorithm for IEEE 802.11 wireless networks. Intention was to provide data confidentiality comparable to that of a traditional wired network. Recognizable by the key of 10 or 26 hexadecimal digits.

Front 271

WIFI

Back 271

Wireless Fidelity

Hint 271

Wireless Fidelity - A popular technology that allows an electronic device to exchange data wirelessly (using radio waves) over a computer network, including high-speed Internet connections.

Front 272

WINS

Back 272

Windows Internet Name Service

Hint 272

Windows Internet Name Service - Software which resolves NetBIOS names to IP addresses.

Front 273

WLAN

Back 273

Wireless Local Area Network

Hint 273

Wireless Local Area Network - Links two or more devices using some wireless distribution method (typically spread-spectrum or OFDM radio), and usually providing a connection through an access point to the wider internet. This gives users the mobility to move around within a local coverage area and still be connected to the network.

Front 274

WPA

Back 274

Wireless Protected Access

Hint 274

Wireless Protected Access - A security scheme for wireless networks, developed by the networking industry in response to the shortcomings of Wired Equivalent Privacy (WEP). WPA uses Temporal Key Integrity Protocol (TKIP) encryption and provides built-in authentication, giving security comparable to VPN tunneling with WEP, with the benefit of easier administration and use.

Front 275

WUXGA

Back 275

Wide Ultra Extended Graphics Array

Hint 275

Wide Ultra Extended Graphics Array - A display resolution of 1920×1200 pixels (2,304,000 pixels) with a 16:10 screen aspect ratio.

Front 276

XGA

Back 276

eXtended Graphics Array

Hint 276

eXtended Graphics Array - An IBM display standard introduced in 1990. XGA-2 added 1024×768 support for high color and higher refresh rates, improved performance, and support for 1360×1024 in 16 colors.

Front 277

ZIF

Back 277

Zero Insertion Force

Hint 277

Zero Insertion Force - A kind of socket for integrated circuits. A ZIF socket can be opened and closed by means of a lever or screw. When open, there the chip may be placed in the socket without any pressure at all, the socket is then closed, causing its contacts to grip the pins of the chip. Such sockets are used where chips must be inserted and removed frequently, such as in test equipment. They are more expensive and usually take up more space than conventional IC sockets.

Front 278

ZIP

Back 278

Zig-zag In-line Package

Hint 278

Zig-zag In-line Package - A short-lived packaging technology for integrated circuits, particularly dynamic RAM chips. It was intended as a replacement for dual in-line packaging (DIL or DIP).

Front 279

IPX/SPX

Back 279

Internetwork Packet Exchange/Sequenced Packet Exchange

Hint 279

Internetwork Packet Exchange/Sequenced Packet Exchange - Networking protocols used primarily on networks using the Novell NetWare operating systems.