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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
RAMBUS® dynamic random access memory
Term
RF
 Definition
radio frequency
Term
RFI
 Definition
radio frequency interference
Term
RGB
 Definition
red green blue
Term
RIMM
 Definition
RAMBUS® 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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