Most Important and Commonly used A to Z Computer Science Abbreviations
In this article, you are going to learn 300+ very common and very important Computer Science/IT abbreviations. These MCQs are very important for the preparation of exams as well as job tests. This list is arranged from A to Z and includes computer-related abbreviations from Basic to advance levels. This important article can also be downloaded in PDF format from the d0wnload link at the end of this article.
ADSL: Asymmetric Digital Subscriber Line | CAI: Computer-Aided Instruction |
ADT: Abstract Data Type | CAM: Computer-Aided Manufacturing |
AGP: Accelerated Graphics Port | CASE: Computer-Aided Software Engineering |
AI: Artificial Intelligence | CCNA: Cisco Certified Network Associate |
ALU: Arithmetic Logic Unit | CD: Compact Disc |
AM: Amplitude Modulation | CD-ROM: Compact Disc Read-Only Memory |
AMD: Advanced Micro Devices | CD-RW: Compact Disc Rewritable |
AMOLED: Active-Matrix Organic Light-Emitting Diode | CLI: Command Line Interface |
ANSI: American National Standards Institute | CMOS: Complementary Metal-Oxide Semiconductor |
API: Application Programming Interface | CMS: Content Management System |
ARP: Address Resolution Protocol | COBOL: Common Business-Oriented Language |
ARPANET: Advanced Research Projects Agency Network | CPU: Central Processing Unit |
ASCII: American Standard Code for Information Interchange | CRL: Common Language Runtime |
ATA: Advanced Technology Attachment | CRT: Cathode Ray Tube |
ATM: Asynchronous Transfer Mode | CS: Computer Science |
B2B: Business to Business | CSMA/CD—Carrier sense multiple access with collision detection |
B2C: Business to Consumer | CSS: Cascading Style Sheets |
BASIC: Beginner’s All-Purpose Symbolic Instruction Code | CU: Control Unit |
BCD: Binary Coded Decimal | DA: Data Administrator |
BIOS: Basic Input Output System | DAT: Digital Audio Tape |
BT: Bluetooth | DB: Database |
C2C: Consumer to Consumer | DBA: Database Administrator |
CAD: Computer-Aided Design | DBMS: Database Management System |
CAE: Computer-Aided Engineering | DDL: Data Definition Language |

DDL: Dynamic Link Library | EDGE: Enhanced Data rates for GSM Evolution |
DDR: Double Data Rate | EDI: Electronic Data Interchange |
DEC: Digital Equipment Corporation | EDVAC: Electronic Discrete Variable Automatic Computer |
DFD: Data Flow Diagram | EEPROM: Electronically Erasable Programmable Read-Only Memory |
DHCP: Dynamic Host Configuration Protoco | EFI: Extensible Firmware Interface |
DIMM: Dual Inline Memory Module | Email: Electronic Mail |
DLL: Dynamic Link Library | ENIAC: Electronic Numerical Integrator And Computer |
DMA: Direct Memory Access | EPROM: Erasable Programmable Read-Only Memory |
DML: Data Manipulation Language | ERD: Entity-Relationship Diagram |
DNS: Domain Name System | ERM: Entity-Relationship Model |
DOS: Disk Operating System | ERP: Enterprise Resource Planning |
DP: Display Port | eSATA: External Serial Advanced Technology Attachment |
DP: Dot Pitch | FAT: File Allocation Table |
DPI: Dots Per Inch | FDDI: Fiber Distributed Data Interface |
DRAM: Dynamic Random-Access Memory | FDM: Frequency Division Multiplexing |
DSL: Digital Subscriber Line | FPS: Frames Per Second |
DVD: Digital Versatile Disc | FIFO: First In First Out |
DVD-R: DVD-Recordable | FM: Frequency Modulation |
DVD-ROM: DVD-Read Only Memory | FORTAN: Formula Translation |
DVD-RW: DVD-Rewritable | FDM: Frequency-Division Multiplexing |
DVI: Digital Visual Interface | FTP: File Transfer Protocol |
DVR: Digital Video Recorder | GB: Gigabyte |
EBCDIC: Extended Binary Coded Decimal Interchange Code | GHz: Gigahertz |
Ecommerce: Electronic Commerce |

GIF: Graphics Interchange Format | IC: Integrated Circuit |
GIGO: Garbage in, Garbage Out | ICMP: Internet Control Message Protocol |
GIS: Geographic Information System | ICT: Information and Communication Technology |
GPS: Global Positioning System | IDE: Integrated Development Environment |
GMT: Greenwich Mean Time | IE: Internet Explorer |
GPL: General Public License | IEEE: Institute of Electrical and Electronics Engineers |
GPRS: General Packet Radio Service | IGMP: Internet Group Management Protocol |
GPU: Graphics Processing Unit | IIS: Internet Information Services |
GSM: Global System for Mobile | IM: Instant Messaging |
GUI:Graphical User Interface | INTEL: Integrated Electronics |
HCI:Human Computer Interaction | IoT: Internet of Things |
HD:High Definition | IP: Internet Protocol |
HDD:Hard Disk Drive | IPsec: Internet Protocol security |
HDL: Hardware Description Language | IPv4: Internet Protocol version 4 |
HDMI: High-Definition Multimedia Interface | IPv6: Internet Protocol version 6 |
HP: Hewlett-Packard | ISDN: Integrated Services Digital Network |
HTC: High-Throughput Computing | IPS: Instructions Per Second |
HTML: Hypertext Markup Language | IS-IS: Intermediate System to Intermediate System |
HTTP: Hypertext Transfer Protocol | ISO: International Organization for Standardization |
HTTPs: Hypertext Transfer Protocol Secure | ISP: Internet Service Provider |
Hz:Hertz | JDK: Java development Kit |
I/O: Input/output | JPEG: Joint Photographic Experts Group |
IaaS: Infrastructure as a Service | |
IBM: International Business Machines |

JRE: Java Runtime Environment | MHz: Mega Hertz |
JS: JavaScript | MIDI: Musical Instrument Digital Interface |
JSON: JavaScript Object Notation | MIMD: Multiple Instruction, Multiple Data |
KB: Kilobyte | ML: Machine Learning |
Kb: Kilobit | MMS: Multimedia Messaging Service |
KBPS: Kilobit Per Second | MPEG: Motion Pictures Experts Group |
KHz: Kilo Hertz | MSB: Most significant Bit |
LAN: Local Area Network | MSDN: Microsoft Developer Network |
LCD: Liquid Crystal Display | NASM: Netwide Assembler |
LED: Light-Emitting Diode | NAT: Network Address Translation |
LIFO: Last In First Out | NetBIOS: Network Basic Input/output System |
LISP: List Processing | NIC: Network Interface Controller |
LLC: Logical Link Control | NRU: Not Recently Used |
LoC: Lines of Code | NT: New Technology |
LRU: Least Recently Used | NTFS: New Technology Filesystem |
LSB: Least Significant Bit | OCR: Optical Character Recognition |
LSI: Large-Scale Integration | OMR: Optical Mark Recognition |
LTE: Long Term Evolution | OS: Operating System |
MAC: Media Access Control | OSI: Open System Interconnection |
MAN: Metropolitan Area Network | PaaS: Platform as a Service |
MAR: Memory Address Register | PAN: Personal Area Network |
MB:Megabyte | PC: Personal Computer |
Mb: Megabit | PCB: Process Control Block |
MBR: Master Boot Record | PCI: Peripheral Component Interconnect |
PDA: Personal Digital Assistant | SCSI: Small Computer System Interface |
PDF: Portable Document Format | SD: Secure Digital |
PERL: Practical Extraction and Reporting Language | SDLC: Software development life cycle |
PNG: Portable Network Graphics | SEO: Search Engine Optimization |
PnP: Plug-and-Play | SIM: Subscriber Identification Module |
POP: Post Office Protocol | SIMD: Single Instruction, Multiple Data |
POS: Point of Sale | SIMM: Single Inline Memory Module |
POST: Power-On Self-Test | SMS: Short Message Service |
PPI: Pixel per inch | SMTP: Simple Mail Transfer Protocol |
PROM: Programmable Read Only Memory | SQA: Software quality Assurance |
PS/2: Personal System/2 | SQL: Structured Query Language |
QA: Quality Assurance | SRAM: Static Random-Access Memory |
RAD: Rapid Application Development | SSD: Solid State Drive |
RAID: Redundant Array of Independent Disks | SSH: Secure Shell |
RAM: Random Access Memory | SSI: Small Scale Integration |
RDBMS: Relational Database Management System | SSID: Service Set Identifier |
RDMA: Remote direct memory access | STP: Spanning Tree Protocol |
RFC: Request For Comments | SVGA: Super Video Graphics Array |
RFID: Radio Frequency Identification | TASM: Turbo Assembler |
RISC: Reduced Instruction Set Computer | TB: Terabyte |
RGB: Red, Green, Blue | TCP: Transmission Control Protocol |
ROM: Read Only Memory | TDM: Time division Multiplexing |
SaaS: Software as a Servcie | TFTP: Trivial File Transfer Protocol |
SATA: Serial Advanced Technology Attachment | TTL: Time to live |
UDP: User Datagram protocol | WMA: Windows Media Audio |
UI: User Interface | WPF: Windows Presentation Foundation |
ULSI: Ultra large-scale integration | WORM: Write once, Read many |
UNIVAC: Universal Automatic Computer | WPA: Wi-Fi Protected Access |
UPS: Uninterruptible Power Supply | WWW: Word wide web |
URL: Uniform Resource Locator | XML: eXtensible Markup Language |
USB: Universal Serial Bus | XP: Extreme Programming |
UTC: Coordinated Universal Time | |
UTP: Unshielded Twisted Pair | |
VB: Visual Basic | |
VDT: Visual Display Terminal | |
VDU: Visual Display Unit | |
VGA: Video Graphics Array | |
VIRUS: Vital information Recourse Under Siege | |
VLAN: Virtual Local Area Network | |
VoIP: Voice over Internet Protocol | |
VPN: Virtual Private Network | |
VR: Virtual Reality | |
W3C: World Wide Web Consortium | |
WAN: Wide Area Network | |
WAP: Wireless Access Point | |
Wi-Fi: Wireless Fidelity | |
WiMax: Worldwide Interoperability for Microwave Access | |
WMV: Windows Media Video |
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