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CompTIA A+ Acronyms
The following is a list of acronyms which appear on the CompTIA A+ exams. Candidates are encouraged to review the complete list and attain a working knowledge of all listed acronyms as a part of a com
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09/16/2015

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Term
AC
Definition
alternating current
Term
ACL
Definition
access control list
Term
ACPI
Definition
advanced configuration power interface
Term
ACT
Definition
activity
Term
ADSL
Definition
asymmetrical digital subscriber line
Term
AGP
Definition
accelerated graphics port
Term
AHCI
Definition
Advanced host controller interface
Term
AMD
Definition
advanced micro devices
Term
AP
Definition
Access point
Term
APIPA
Definition
automatic private internet protocol addressing
Term
APM
Definition
advanced power management
Term
ARP
Definition
address resolution protocol
Term
ASR
Definition
automated system recovery
Term
ATA
Definition
advanced technology attachment
Term
ATAPI
Definition
advanced technology attachment packet interface
Term
ATM
Definition
asynchronous transfer mode
Term
ATX
Definition
advanced technology extended
Term
A/V
Definition
Audio Video
Term
BIOS
Definition
basic input/output system
Term
BNC
Definition
Bayonet-Neill-Concelman or British Naval Connector
Term
BTX
Definition
balanced technology extended
Term
CAPTCHA
Definition
Completely Automated Public Turing Test To Tell Computers and Humans Apart
Term
CCFL
Definition
Cold Cathode Fluorescent Lamp
Term
CD
Definition
compact disc
Term
CD-ROM
Definition
compact disc-read-only memory
Term
CD-RW
Definition
compact disc-rewritable
Term
CDFS
Definition
compact disc file system
Term
CFS
Definition
Central File System, Common File System, Command File System
Term
CIFS
Definition
Common Internet File System
Term
CMOS
Definition
complementary metal-oxide semiconductor
Term
CNR
Definition
Communications and Networking Riser
Term
COMx
Definition
communication port (x=port number)
Term
CPU
Definition
central processing unit
Term
CRIMM
Definition
Continuity Rambus Inline Memory Mode
Term
CRT
Definition
cathode-ray tube
Term
DAC
Definition
discretionary access control
Term
DB-25
Definition
serial communications D-shell connector, 25 pins
Term
DB-9
Definition
9 pin D shell connector
Term
DC
Definition
direct current
Term
DDOS
Definition
distributed denial of service
Term
DDR
Definition
double data-rate
Term
DDR RAM
Definition
double data-rate random access memory
Term
DDR SDRAM
Definition
double data-rate synchronous dynamic random access memory
Term
DFS
Definition
distributed file system
Term
DHCP
Definition
dynamic host configuration protocol
Term
DIMM
Definition
dual inline memory module
Term
DIN
Definition
Deutsche Industrie Norm
Term
DIP
Definition
dual inline package
Term
DLP
Definition
digital light processing
Term
DLT
Definition
digital linear tape
Term
DMA
Definition
direct memory access
Term
DMZ
Definition
demilitarized zone
Term
DNS
Definition
domain name service or domain name server
Term
DOS
Definition
denial of service
Term
DRAM
Definition
dynamic random access memory
Term
DSL
Definition
digital subscriber line
Term
DVD
Definition
digital video disc or digital versatile disc
Term
DVD-R
Definition
digital video disc-recordable
Term
DVD-RAM
Definition
digital video disc-random access memory
Term
DVD-ROM
Definition
digital video disc-read only memory
Term
DVD-RW
Definition
digital video disc-rewritable
Term
DVI
Definition
digital visual interface
Term
ECC
Definition
error correction code
Term
ECP
Definition
extended capabilities port
Term
EEPROM
Definition
electrically erasable programmable read-only memory
Term
EFS
Definition
encrypting file system
Term
EIDE
Definition
enhanced integrated drive electronics
Term
EMI
Definition
electromagnetic interference
Term
EMP
Definition
electromagnetic pulse
Term
EPP
Definition
enhanced parallel port
Term
EPROM
Definition
erasable programmable read-only memory
Term
ERD
Definition
emergency repair disk
Term
ESD
Definition
electrostatic discharge
Term
EVDO
Definition
evolution data optimized or evolution data only
Term
EVGA
Definition
extended video graphics adapter/array
Term
FAT
Definition
file allocation table
Term
FAT12
Definition
12-bit file allocation table
Term
FAT16
Definition
16-bit file allocation table
Term
FAT32
Definition
32-bit file allocation table
Term
FDD
Definition
floppy disk drive
Term
FPM
Definition
fast page-mode
Term
FQDN
Definition
fully qualified domain name
Term
FRU
Definition
field replaceable unit
Term
FSB
Definition
Front Side Bus
Term
FTP
Definition
file transfer protocol
Term
Fn
Definition
Function (referring to the function key on a laptop)
Term
GB
Definition
gigabyte
Term
GDI
Definition
graphics device interface
Term
GHz
Definition
gigahertz
Term
GPS
Definition
global positioning system
Term
GSM
Definition
global system for mobile communications
Term
GUI
Definition
graphical user interface
Term
Gb
Definition
gigabit
Term
HAL
Definition
hardware abstraction layer
Term
HAV
Definition
Hardware Assisted Virtualization
Term
HCL
Definition
hardware compatibility list
Term
HDD
Definition
hard disk drive
Term
HDMI
Definition
high definition media interface
Term
HPFS
Definition
high performance file system
Term
HTML
Definition
hypertext markup language
Term
HTPC
Definition
Home theater PC
Term
HTTP
Definition
hypertext transfer protocol
Term
HTTPS
Definition
hypertext transfer protocol over secure sockets layer
Term
I/O
Definition
input/output
Term
ICMP
Definition
internet control message protocol
Term
ICR
Definition
intelligent character recognition
Term
IDE
Definition
integrated drive electronics
Term
IDS
Definition
Intrusion Detection System
Term
IEEE
Definition
Institute of Electrical and Electronics Engineers
Term
IIS
Definition
Internet Information Services
Term
IMAP
Definition
internet mail access protocol
Term
IP
Definition
internet protocol
Term
IPCONFIG
Definition
internet protocol configuration
Term
IPP
Definition
internet printing protocol
Term
IPSEC
Definition
internet protocol security
Term
IR
Definition
infrared
Term
IRQ
Definition
interrupt request
Term
ISA
Definition
industry standard architecture
Term
ISDN
Definition
integrated services digital network
Term
ISO
Definition
Industry Standards Organization
Term
ISP
Definition
internet service provider
Term
IrDA
Definition
Infrared Data Association
Term
JBOD
Definition
just a bunch of disks
Term
KB
Definition
Kilobyte or knowledge base
Term
Kb
Definition
kilobit
Term
LAN
Definition
local area network
Term
LBA
Definition
logical block addressing
Term
LC
Definition
Lucent connector
Term
LCD
Definition
liquid crystal display
Term
LDAP
Definition
lightweight directory access protocol
Term
LED
Definition
light emitting diode
Term
LPD/LPR
Definition
line printer daemon / line printer remote
Term
LPT
Definition
line printer terminal
Term
LVD
Definition
low voltage differential
Term
Li-on
Definition
lithium-ion
Term
MAC
Definition
media access control / mandatory access control
Term
MAPI
Definition
messaging application programming interface
Term
MAU
Definition
media access unit, media attachment unit
Term
MB
Definition
megabyte
Term
MBR
Definition
master boot record
Term
MBSA
Definition
Microsoft Baseline Security Analyzer
Term
MCA
Definition
Micro Channel Architecture
Term
MFD
Definition
multi-function device
Term
MFP
Definition
multi-function product
Term
MHz
Definition
megahertz
Term
MIDI
Definition
musical instrument digital interface
Term
MIME
Definition
multipurpose internet mail extension
Term
MIMO
Definition
Multiple Input Multiple Output
Term
MMC
Definition
Microsoft management console
Term
MMX
Definition
multimedia extensions
Term
MP3
Definition
Moving Picture Experts Group Layer 3 Audio
Term
MP4
Definition
Moving Picture Experts Group Layer 4
Term
MPEG
Definition
Moving Picture Experts Group
Term
MSCONFIG
Definition
Microsoft configuration
Term
MSDS
Definition
material safety data sheet
Term
MUI
Definition
multilingual user interface
Term
Mb
Definition
megabit
Term
Micro
Definition
DIMM micro dual inline memory module
Term
NAC
Definition
network access control
Term
NAS
Definition
network-attached storage
Term
NAT
Definition
network address translation
Term
NFS
Definition
network file system
Term
NIC
Definition
network interface card
Term
NLX
Definition
new low-profile extended
Term
NNTP
Definition
network news transfer protocol
Term
NTFS
Definition
new technology file system
Term
NTLDR
Definition
new technology loader
Term
NTP
Definition
Network Time Protocol
Term
NetBEUI
Definition
networked basic input/output system extended user interface
Term
NetBIOS
Definition
networked basic input/output system
Term
NiCd
Definition
nickel cadmium
Term
NiMH
Definition
nickel metal hydride
Term
OCR
Definition
optical character recognition
Term
OEM
Definition
original equipment manufacturer
Term
OLED
Definition
Organic Light Emitting Diode
Term
OS
Definition
operating system
Term
PAN
Definition
personal area network
Term
PATA
Definition
parallel advanced technology attachment
Term
PC
Definition
personal computer
Term
PCI
Definition
peripheral component interconnect
Term
PCIX
Definition
peripheral component interconnect extended
Term
PCIe
Definition
peripheral component interconnect express
Term
PCL
Definition
printer control language
Term
PCMCIA
Definition
Personal Computer Memory Card International Association
Term
PDA
Definition
personal digital assistant
Term
PGA
Definition
pin grid array
Term
PGA2
Definition
pin grid array 2
Term
PII
Definition
Personally Identifiable Information
Term
PIN
Definition
personal identification number
Term
PKI
Definition
public key infrastructure
Term
POP3
Definition
post office protocol 3
Term
POST
Definition
power-on self test
Term
POTS
Definition
plain old telephone service
Term
PPP
Definition
point-to-point protocol
Term
PPTP
Definition
point-to-point tunneling protocol
Term
PRI
Definition
primary rate interface
Term
PROM
Definition
programmable read-only memory
Term
PS/2
Definition
personal system/2 connector
Term
PSTN
Definition
public switched telephone network
Term
PSU
Definition
power supply unit
Term
PVC
Definition
permanent virtual circuit
Term
PXE
Definition
preboot execution environment
Term
PnP
Definition
plug and play
Term
PoS
Definition
Point of Sale
Term
QoS
Definition
quality of service
Term
RAID
Definition
redundant array of independent (or inexpensive) discs
Term
RAM
Definition
random access memory
Term
RAS
Definition
remote access service
Term
RDP
Definition
Remote Desktop Protocol
Term
RDRAM
Definition
RAMBUSĀ® dynamic random access memory
Term
RF
Definition
radio frequency
Term
RFI
Definition
radio frequency interference
Term
RGB
Definition
red green blue
Term
RIMM
Definition
RAMBUSĀ® inline memory module
Term
RIP
Definition
routing information protocol
Term
RIS
Definition
remote installation service
Term
RISC
Definition
reduced instruction set computer
Term
RJ
Definition
registered jack
Term
RJ-11
Definition
registered jack function 11
Term
RJ-45
Definition
registered jack function 45
Term
RMA
Definition
returned materials authorization
Term
ROM
Definition
read only memory
Term
RS-232 or RS-232C
Definition
recommended standard 232
Term
RTC
Definition
real-time clock
Term
S.M.A.R.T.
Definition
self-monitoring, analysis, and reporting technology
Term
SAN
Definition
storage area network
Term
SAS
Definition
Serial Attached SCSI
Term
SATA
Definition
serial advanced technology attachment
Term
SC
Definition
subscription channel
Term
SCP
Definition
secure copy protection
Term
SCSI
Definition
small computer system interface
Term
SCSI ID
Definition
small computer system interface identifier
Term
SD card
Definition
secure digital card
Term
SDRAM
Definition
synchronous dynamic random access memory
Term
SEC
Definition
single edge connector
Term
SFC
Definition
system file checker
Term
SFF
Definition
Small Form Factor
Term
SGRAM
Definition
synchronous graphics random access memory
Term
SIMM
Definition
single inline memory module
Term
SLI
Definition
scalable link interface or system level integration or scanline interleave mode
Term
SMB
Definition
server message block or small to midsize business
Term
SMTP
Definition
simple mail transfer protocol
Term
SNMP
Definition
simple network management protocol
Term
SOHO
Definition
small office/home office
Term
SP
Definition
service pack
Term
SP1
Definition
service pack 1
Term
SP2
Definition
service pack 2
Term
SP3
Definition
service pack 3
Term
SP4
Definition
service pack 4
Term
SPDIF
Definition
Sony-Philips digital interface format
Term
SPGA
Definition
staggered pin grid array
Term
SRAM
Definition
static random access memory
Term
SSH
Definition
secure shell
Term
SSID
Definition
service set identifier
Term
SSL
Definition
secure sockets layer
Term
ST
Definition
straight tip
Term
STP
Definition
shielded twisted pair
Term
SVGA
Definition
super video graphics array
Term
SXGA
Definition
super extended graphics array
Term
SoDIMM
Definition
small outline dual inline memory module
Term
TB
Definition
terabyte
Term
TCP
Definition
transmission control protocol
Term
TCP/IP
Definition
transmission control protocol/internet protocol
Term
TDR
Definition
time domain reflectometer
Term
TFTP
Definition
trivial file transfer protocol
Term
TKIP
Definition
Temporal Key Integrity Protocol
Term
TPM
Definition
trusted platform module
Term
UAC
Definition
user account control
Term
UART
Definition
universal asynchronous receiver transmitter
Term
UDF
Definition
user defined functions or universal disk format or universal data format
Term
UDMA
Definition
ultra direct memory access
Term
UDP
Definition
user datagram protocol
Term
UNC
Definition
universal naming convention
Term
UPS
Definition
uninterruptible power supply
Term
URL
Definition
uniform resource locator
Term
USB
Definition
universal serial bus
Term
USMT
Definition
user state migration tool
Term
UTP
Definition
unshielded twisted pair
Term
UXGA
Definition
ultra extended graphics array
Term
VESA
Definition
Video Electronics Standards Association
Term
VFAT
Definition
virtual file allocation table
Term
VGA
Definition
video graphics array
Term
VM
Definition
Virtual Machine
Term
VPN
Definition
virtual private network
Term
VRAM
Definition
video random access memory
Term
VoIP
Definition
voice over internet protocol
Term
WAN
Definition
wide area network
Term
WAP
Definition
wireless application protocol
Term
WEP
Definition
wired equivalent privacy
Term
WIFI
Definition
wireless fidelity
Term
WINS
Definition
windows internet name service
Term
WLAN
Definition
wireless local area network
Term
WPA
Definition
wireless protected access
Term
WPS
Definition
WiFi Protected Setup
Term
WUXGA
Definition
wide ultra extended graphics array
Term
XGA
Definition
extended graphics array
Term
ZIF
Definition
zero-insertion-force
Term
ZIP
Definition
zigzag inline package
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