CompTIA IT Fundamentals Acronyms

A comprehensive list of CompTIA IT Fundamentals acronyms and their definitions to aid in exam preparation.

AC

Alternating Current

ACL

Access Control List

AES

Advanced Encryption Standard

AIO

All In One

ARM

Advanced RISC Machines

ARP

Address Resolution Protocol

ASCII

American Standard Code for Information Interchange

BD-ROM

Blu-ray Read-Only Memory

BIOS

Basic Input/Output System

CAD

Computer-Aided Design

CAM

Computer-Aided Manufacturing

CD

Compact Disc

CD-ROM

Compact Disc-Read-Only Memory

CD-RW

Compact Disc-Rewritable

CPU

Central Processing Unit

CRUD

Create, Read, Update, Delete

CSS

Cascading Style Sheets

DC

Direct Current

DDL

Data Definition Language

DDoS

Distributed Denial of Service

DDR

Double Data-Rate

DHCP

Dynamic Host Configuration Protocol

DIMM

Dual Inline Memory Module

DLP

Data Loss Prevention

DML

Data Manipulation Language

DNS

Domain Name Service or Domain Name Server

DoS

Denial of Service

DSL

Digital Subscriber Line

DVD

Digital Video Disc or Digital Versatile Disc

DVD-R

Digital Video Disc-Recordable

DVD-RW

Digital Video Disc-Rewritable

DVI

Digital Visual Interface

EMI

Electromagnetic Interference

eSATA

External Serial Advanced Technology Attachment

ESD

Electrostatic Discharge

EULA

End-User License Agreement

FAT

File Allocation Table

FAT32

32-bit File Allocation Table

FTP

File Transfer Protocol

FTPS

File Transfer Protocol over Secure Sockets Layer

Gb

Gigabit

GB

Gigabyte

Gbps

Gigabit per second

GHz

Gigahertz

GPS

Global Positioning System

GPU

Graphics Processing Unit

GUI

Graphical User Interface

HDD

Hard Disk Drive

HDMI

High-Definition Media Interface

HFS

Hierarchical File System

HTML

Hypertext Markup Language

HTTP

Hypertext Transfer Protocol

HTTPS

Hypertext Transfer Protocol over Secure Sockets Layer

ICMP

Internet Control Message Protocol

IMAP

Internet Mail Access Protocol

IOPS

Input/Output Operations Per Second

IoT

Internet of Things

IP

Internet Protocol

IPS

Intrusion Prevention System

IR

Infrared

ISP

Internet Service Provider

Kb

Kilobit

KB

Kilobyte or Knowledge Base

Kbps

Kilobit per second

LAN

Local Area Network

MAC

Media Access Control

MB

Megabyte

Mb

Megabit

Mbps

Megabit per second

MHz

Megahertz

MITM

Man in the Middle

MP3

Moving Picture Experts Group Layer 3 Audio

MP4

Moving Picture Experts Group Layer 4

NAS

Network Attached Storage

NDA

Non-disclosure Agreement

NFC

Near Field Communications

NIC

Network Interface Card

NTFS

New Technology File System

OEM

Original Equipment Manufacturer

OS

Operating System

PB

Petabyte

PC

Personal Computer

PCI

Peripheral Component Interconnect

PCIe

Peripheral Component Interconnect Express

PII

Personally Identifiable Information

PIN

Personal Identification Number

POP

Post Office Protocol

POP3

Post Office Protocol 3

PSU

Power Supply Unit

PXE

Preboot Execution Environment

RAID

Redundant Array of Independent Disks

RAM

Random Access Memory

RF

Radio Frequency

RJ

Registered Jack

RJ-11

Registered Jack Function 11

RJ-45

Registered Jack Function 45

ROM

Read-Only Memory

SaaS

Software as a Service

SATA

Serial Advanced Technology Attachment

SD card

Secure Digital Card