Computer Abbreviations are one of the most frequently asked topics in the Computer Awareness section of major competitive exams such as RSMSSB CET, SSC, Bank, RRB, and Railway. This carefully compiled list of 200+ important computer abbreviations with their full forms covers hardware, memory, networking, protocols, database, security, cloud, and emerging technology terms — everything you need to score full marks in this section.

Why it matters: Questions from computer full forms appear almost every year in RSMSSB CET and other government exams. Memorising these can fetch you easy, guaranteed marks.

Computer Abbreviations List (1–100): Basic Hardware, Memory & Language Terms

No. Abbreviation Full Form
1 CPU Central Processing Unit
2 ALU Arithmetic Logic Unit
3 CU Control Unit
4 RAM Random Access Memory
5 ROM Read Only Memory
6 PROM Programmable Read Only Memory
7 EPROM Erasable Programmable Read Only Memory
8 EEPROM Electrically Erasable Programmable Read Only Memory
9 SRAM Static Random Access Memory
10 DRAM Dynamic Random Access Memory
11 SDRAM Synchronous Dynamic Random Access Memory
12 DDR Double Data Rate
13 HDD Hard Disk Drive
14 SSD Solid State Drive
15 SSHD Solid State Hybrid Drive
16 USB Universal Serial Bus
17 HDMI High Definition Multimedia Interface
18 VGA Video Graphics Array
19 DVI Digital Visual Interface
20 DP DisplayPort
21 PSU Power Supply Unit
22 SMPS Switched Mode Power Supply
23 BIOS Basic Input Output System
24 UEFI Unified Extensible Firmware Interface
25 CMOS Complementary Metal Oxide Semiconductor
26 GPU Graphics Processing Unit
27 NIC Network Interface Card
28 UPS Uninterruptible Power Supply
29 OCR Optical Character Recognition
30 OMR Optical Mark Recognition
31 MICR Magnetic Ink Character Recognition
32 BCR Bar Code Reader
33 QR Quick Response
34 LED Light Emitting Diode
35 LCD Liquid Crystal Display
36 TFT Thin Film Transistor
37 OLED Organic Light Emitting Diode
38 CRT Cathode Ray Tube
39 DPI Dots Per Inch
40 PPI Pixels Per Inch
41 GUI Graphical User Interface
42 CLI Command Line Interface
43 DOS Disk Operating System
44 OS Operating System
45 API Application Programming Interface
46 IDE Integrated Development Environment
47 SDK Software Development Kit
48 JDK Java Development Kit
49 JVM Java Virtual Machine
50 JRE Java Runtime Environment
No. Abbreviation Full Form
51 HTML HyperText Markup Language
52 CSS Cascading Style Sheets
53 XML Extensible Markup Language
54 JSON JavaScript Object Notation
55 SQL Structured Query Language
56 DBMS Database Management System
57 RDBMS Relational Database Management System
58 DDL Data Definition Language
59 DML Data Manipulation Language
60 DCL Data Control Language
61 TCL Transaction Control Language
62 LAN Local Area Network
63 MAN Metropolitan Area Network
64 WAN Wide Area Network
65 PAN Personal Area Network
66 WLAN Wireless Local Area Network
67 SAN Storage Area Network
68 VPN Virtual Private Network
69 IP Internet Protocol
70 TCP Transmission Control Protocol
71 UDP User Datagram Protocol
72 HTTP HyperText Transfer Protocol
73 HTTPS HyperText Transfer Protocol Secure
74 FTP File Transfer Protocol
75 SFTP Secure File Transfer Protocol
76 SMTP Simple Mail Transfer Protocol
77 POP Post Office Protocol
78 IMAP Internet Message Access Protocol
79 DNS Domain Name System
80 DHCP Dynamic Host Configuration Protocol
81 URL Uniform Resource Locator
82 URI Uniform Resource Identifier
83 WWW World Wide Web
84 ISP Internet Service Provider
85 MAC Media Access Control
86 SSID Service Set Identifier
87 NAT Network Address Translation
88 VoIP Voice over Internet Protocol
89 Wi-Fi Wireless Fidelity
90 AI Artificial Intelligence
91 ML Machine Learning
92 DL Deep Learning
93 NLP Natural Language Processing
94 IoT Internet of Things
95 ICT Information and Communication Technology
96 IT Information Technology
97 CAD Computer Aided Design
98 CAM Computer Aided Manufacturing
99 CAE Computer Aided Engineering

Computer Abbreviations List (101–201): File Formats, Networking, Security & Cloud Terms

No. Abbreviation Full Form
101 ASCII American Standard Code for Information Interchange
102 Unicode Universal Character Encoding Standard
103 EBCDIC Extended Binary Coded Decimal Interchange Code
104 BCD Binary Coded Decimal
105 PDF Portable Document Format
106 JPEG Joint Photographic Experts Group
107 JPG Joint Photographic Experts Group
108 PNG Portable Network Graphics
109 GIF Graphics Interchange Format
110 BMP Bitmap
111 TIFF Tagged Image File Format
112 SVG Scalable Vector Graphics
113 MP3 MPEG Audio Layer III
114 MP4 MPEG-4 Part 14
115 MPEG Moving Picture Experts Group
116 AVI Audio Video Interleave
117 WMV Windows Media Video
118 FLV Flash Video
119 MKV Matroska Video
120 AAC Advanced Audio Coding
121 WAV Waveform Audio File Format
122 AIFF Audio Interchange File Format
123 CD Compact Disc
124 DVD Digital Versatile Disc
125 BD Blu-ray Disc
126 FDD Floppy Disk Drive
127 PCI Peripheral Component Interconnect
128 PCIe Peripheral Component Interconnect Express
129 AGP Accelerated Graphics Port
130 SATA Serial Advanced Technology Attachment
131 PATA Parallel Advanced Technology Attachment
132 SCSI Small Computer System Interface
133 SAS Serial Attached SCSI
134 NVMe Non-Volatile Memory Express
135 RAID Redundant Array of Independent Disks
136 FAT File Allocation Table
137 NTFS New Technology File System
138 exFAT Extended File Allocation Table
139 FAT32 File Allocation Table 32
140 GPT GUID Partition Table
141 MBR Master Boot Record
142 IRQ Interrupt Request
143 DMA Direct Memory Access
144 POST Power-On Self-Test
145 KVM Keyboard Video Mouse
146 VM Virtual Machine
147 VDI Virtual Desktop Infrastructure
148 VMM Virtual Machine Monitor
149 SaaS Software as a Service
150 PaaS Platform as a Service
151 IaaS Infrastructure as a Service
152 XaaS Anything as a Service
No. Abbreviation Full Form
153 AWS Amazon Web Services
154 GCP Google Cloud Platform
155 CDN Content Delivery Network
156 SSH Secure Shell
157 SSL Secure Sockets Layer
158 TLS Transport Layer Security
159 AES Advanced Encryption Standard
160 DES Data Encryption Standard
161 RSA Rivest Shamir Adleman
162 OTP One Time Password
163 CAPTCHA Completely Automated Public Turing Test to Tell Computers and Humans Apart
164 MFA Multi Factor Authentication
165 AV Antivirus
166 IDS Intrusion Detection System
167 IPS Intrusion Prevention System
168 DDoS Distributed Denial of Service
169 DoS Denial of Service
170 CSRF Cross Site Request Forgery
171 XSS Cross Site Scripting
172 SEO Search Engine Optimization
173 SEM Search Engine Marketing
174 ERP Enterprise Resource Planning
175 CRM Customer Relationship Management
176 MIS Management Information System
177 DSS Decision Support System
178 ESS Executive Support System
179 TPS Transaction Processing System
180 KMS Knowledge Management System
181 GIS Geographic Information System
182 SIM Subscriber Identity Module
183 IMEI International Mobile Equipment Identity
184 IMSI International Mobile Subscriber Identity
185 GSM Global System for Mobile Communications
186 CDMA Code Division Multiple Access
187 LTE Long Term Evolution
188 5G Fifth Generation Mobile Network
189 QRAM Quantum Random Access Memory
190 QPU Quantum Processing Unit
191 CGI Common Gateway Interface
192 FOSS Free and Open Source Software
193 GNU GNU's Not Unix
194 UNIX Uniplexed Information and Computing System
195 PHP Hypertext Preprocessor
196 AJAX Asynchronous JavaScript and XML
197 SOAP Simple Object Access Protocol
198 REST Representational State Transfer
199 W3C World Wide Web Consortium
200 ICANN Internet Corporation for Assigned Names and Numbers
201 IEEE Institute of Electrical and Electronics Engineers
202 ISO International Organization for Standardization
This list covers 200+ essential Computer Abbreviations useful for RSMSSB CET 2026 and almost every competitive exam that includes a Computer Knowledge section. Revise it regularly for a strong grip on the topic.