Computer Abbreviations for Bank Exams: The Short Answer
Computer abbreviations are short forms such as CPU (Central Processing Unit), RAM (Random Access Memory), URL (Uniform Resource Locator) and HTTP (HyperText Transfer Protocol). Bank exams with a computer section (SBI PO Mains, IBPS RRB Officer Scale I and Office Assistant mains, RBI Assistant mains and many state co-operative bank exams) and SSC and RRB general awareness papers ask direct "full form" questions every year. The fastest way to learn them is by group: hardware, memory, storage, networking, internet, software, file formats and security, as in the tables below.
Key takeaway for bank exams: Learn about 100 core abbreviations grouped by topic and you will cover nearly every full-form question in computer awareness. Pay special attention to look-alike pairs (ROM vs RAM, LAN vs WAN, HTTP vs HTTPS, POP vs IMAP) because exams use them as traps.
For the rest of banking awareness, see our banking terms A to Z and NEFT, RTGS, IMPS and UPI difference notes.
Computer Hardware Abbreviations (CPU, ALU and Devices)
| Abbreviation | Full form |
|---|---|
| CPU | Central Processing Unit |
| ALU | Arithmetic Logic Unit |
| CU | Control Unit |
| GPU | Graphics Processing Unit |
| SMPS | Switched-Mode Power Supply |
| UPS | Uninterruptible Power Supply |
| VDU | Visual Display Unit |
| LCD | Liquid Crystal Display |
| LED | Light Emitting Diode |
| CRT | Cathode Ray Tube |
| OCR | Optical Character Recognition |
| OMR | Optical Mark Recognition (also read as Optical Mark Reader) |
| MICR | Magnetic Ink Character Recognition |
| BIOS | Basic Input Output System |
| USB | Universal Serial Bus |
| HDMI | High-Definition Multimedia Interface |
| VGA | Video Graphics Array |
Banking link: MICR is the technology used to read the code printed at the bottom of cheques, and CTS (Cheque Truncation System) clears cheques using their images.
Computer Memory and Storage Abbreviations
| Abbreviation | Full form |
|---|---|
| RAM | Random Access Memory (volatile) |
| ROM | Read Only Memory (non-volatile) |
| PROM | Programmable Read Only Memory |
| EPROM | Erasable Programmable Read Only Memory |
| EEPROM | Electrically Erasable Programmable Read Only Memory |
| SRAM / DRAM | Static / Dynamic Random Access Memory |
| HDD | Hard Disk Drive |
| SSD | Solid State Drive |
| CD-ROM | Compact Disc Read Only Memory |
| DVD | Digital Versatile Disc |
| KB, MB, GB, TB | Kilobyte, Megabyte, Gigabyte, Terabyte |
Memory units: 1 byte = 8 bits; 1 KB = 1,024 bytes; 1 MB = 1,024 KB; 1 GB = 1,024 MB; 1 TB = 1,024 GB; 1 PB = 1,024 TB. A nibble is 4 bits.
Networking Abbreviations (LAN, WAN, IP and More)
| Abbreviation | Full form |
|---|---|
| LAN | Local Area Network |
| MAN | Metropolitan Area Network |
| WAN | Wide Area Network |
| PAN | Personal Area Network |
| WLAN | Wireless Local Area Network |
| Wi-Fi | Wireless Fidelity (popular expansion; the name is a trademark) |
| IP | Internet Protocol |
| TCP | Transmission Control Protocol |
| UDP | User Datagram Protocol |
| MAC | Media Access Control (address) |
| NIC | Network Interface Card |
| ISP | Internet Service Provider |
| VPN | Virtual Private Network |
| DNS | Domain Name System |
| DHCP | Dynamic Host Configuration Protocol |
| OSI | Open Systems Interconnection (7-layer model) |
| ISDN | Integrated Services Digital Network |
| DSL | Digital Subscriber Line |
| Modem | Modulator–Demodulator |
Internet and Email Abbreviations (HTTP, URL, SMTP)
| Abbreviation | Full form |
|---|---|
| WWW | World Wide Web |
| HTTP | HyperText Transfer Protocol |
| HTTPS | HyperText Transfer Protocol Secure |
| HTML | HyperText Markup Language |
| URL | Uniform Resource Locator |
| FTP | File Transfer Protocol |
| SMTP | Simple Mail Transfer Protocol (sending mail) |
| POP3 | Post Office Protocol version 3 (receiving mail) |
| IMAP | Internet Message Access Protocol (receiving and syncing mail) |
| CC / BCC | Carbon Copy / Blind Carbon Copy |
| XML | eXtensible Markup Language |
| ICANN | Internet Corporation for Assigned Names and Numbers |
Software, Programming and OS Abbreviations
| Abbreviation | Full form |
|---|---|
| OS | Operating System |
| GUI | Graphical User Interface |
| CLI | Command Line Interface |
| DOS | Disk Operating System |
| DBMS | Database Management System |
| RDBMS | Relational Database Management System |
| SQL | Structured Query Language |
| COBOL | Common Business-Oriented Language |
| FORTRAN | Formula Translation |
| BASIC | Beginner's All-purpose Symbolic Instruction Code |
| IDE | Integrated Development Environment |
| API | Application Programming Interface |
| AI / ML | Artificial Intelligence / Machine Learning |
| IoT | Internet of Things |
| SaaS / PaaS / IaaS | Software / Platform / Infrastructure as a Service |
File Format Abbreviations
| Abbreviation | Full form |
|---|---|
| Portable Document Format | |
| JPEG | Joint Photographic Experts Group |
| PNG | Portable Network Graphics |
| GIF | Graphics Interchange Format |
| MP3 / MP4 | MPEG Audio Layer III / MPEG-4 Part 14 |
| MPEG | Moving Picture Experts Group |
| CSV | Comma-Separated Values |
| TXT | Text file |
Generations of Computers (Asked with Abbreviations)
| Generation | Main technology | Approximate period |
|---|---|---|
| First | Vacuum tubes | 1940s–1956 |
| Second | Transistors | 1956–1963 |
| Third | Integrated circuits (IC) | 1964–1971 |
| Fourth | Microprocessors (VLSI: Very Large Scale Integration) | 1971–present |
| Fifth | Artificial intelligence, parallel processing (ULSI: Ultra Large Scale Integration) | Present and beyond |
Common Keyboard Shortcuts (Windows) for Computer Awareness
| Shortcut | Action |
|---|---|
| Ctrl + C / Ctrl + X / Ctrl + V | Copy / Cut / Paste |
| Ctrl + Z / Ctrl + Y | Undo / Redo |
| Ctrl + A | Select all |
| Ctrl + S / Ctrl + P | Save / Print |
| Ctrl + F | Find |
| Alt + F4 | Close the active window or program |
| Alt + Tab | Switch between open programs |
| F5 | Refresh (in a browser or File Explorer) |
| Ctrl + Shift + Esc | Open Task Manager |
| Windows key + L | Lock the computer |
These shortcuts are asked as one-liners in IBPS RRB and SBI computer sections, often together with the full forms above.
Cyber Security Abbreviations for Bank Exams
| Abbreviation | Full form |
|---|---|
| OTP | One-Time Password |
| PIN | Personal Identification Number |
| CAPTCHA | Completely Automated Public Turing test to tell Computers and Humans Apart |
| SSL / TLS | Secure Sockets Layer / Transport Layer Security |
| 2FA | Two-Factor Authentication |
| DoS / DDoS | Denial of Service / Distributed Denial of Service |
| CERT-In | Indian Computer Emergency Response Team |
| PKI | Public Key Infrastructure |
| KYC | Know Your Customer |
CERT-In is India's national agency for responding to cyber security incidents, under the Ministry of Electronics and Information Technology.
Computer Abbreviations: Common Exam Traps
- RAM is volatile; ROM is non-volatile. Data in RAM is lost when power goes off.
- SMTP sends mail; POP3 and IMAP receive it.
- HTTPS adds security (encryption through SSL/TLS) to HTTP.
- OCR reads printed text, OMR reads marked bubbles, MICR reads magnetic ink (cheques).
- LAN < MAN < WAN in area covered.
Computer Abbreviations Quiz (Practice Set with Answers)
- What is the full form of ALU? Answer: Arithmetic Logic Unit.
- Which protocol is used to send email? Answer: SMTP (Simple Mail Transfer Protocol).
- What does MICR stand for? Answer: Magnetic Ink Character Recognition.
- What is the full form of URL? Answer: Uniform Resource Locator.
- Which memory is volatile: RAM or ROM? Answer: RAM.
- What does DNS stand for? Answer: Domain Name System.
- How many bits make a byte? Answer: 8.
- What is the full form of CAPTCHA? Answer: Completely Automated Public Turing test to tell Computers and Humans Apart.
- What does PDF stand for? Answer: Portable Document Format.
- What is the full form of VPN? Answer: Virtual Private Network.
For timed practice, take the SBI PO Mains Reasoning and Computer Aptitude Sectional Mock Test 01 and Sectional Mock Test 02.
Computer Abbreviations FAQs
Which computer abbreviations are most important for bank exams?
CPU, ALU, RAM, ROM, BIOS, USB, LAN, WAN, IP, TCP, DNS, HTTP, HTTPS, URL, SMTP, POP3, OCR, OMR, MICR, OTP, PIN, SSL and DBMS are asked most often.
What is the full form of CPU?
Central Processing Unit. It has two main parts: the Arithmetic Logic Unit (ALU) and the Control Unit (CU).
What is the difference between HTTP and HTTPS?
HTTP (HyperText Transfer Protocol) transfers web pages; HTTPS is the secure version that encrypts data using SSL/TLS, which is why banking websites use HTTPS.
Which exams have a computer awareness section?
SBI PO Mains (Reasoning and Computer Aptitude), IBPS RRB Officer Scale I and Office Assistant mains, RBI Assistant mains and many state co-operative bank exams. SSC and RRB papers also include computer questions in general awareness.
What is the full form of MICR and where is it used?
Magnetic Ink Character Recognition. It is used to read the MICR code printed at the bottom of bank cheques for fast clearing.
How many bytes are there in 1 KB?
1,024 bytes, because computer memory uses powers of 2 (2¹⁰ = 1,024).
What is the full form of BIOS and what does it do?
Basic Input Output System. It is firmware stored on a chip on the motherboard that checks the hardware when the computer is switched on (the POST, Power-On Self-Test) and then loads the operating system.
Practice Next
- Mock tests: SBI PO Mains Reasoning and Computer Aptitude Sectional Mock Test 01, SBI PO Mains Reasoning and Computer Aptitude Sectional Mock Test 02 and SBI PO Mains Banking Awareness Mock Test 01, plus NEFT, RTGS & Payment Systems Quiz 01.
- Related notes: banking terms A to Z, NEFT, RTGS, IMPS and UPI difference, types of cheques in banking and insurance sector in India.
- Exam details: SBI Clerk 2026 notification.
- Browse all study notes.