Computer Shortcut Keys and Full Forms for Job Tests
Updated 17 Oct 2026
The most-asked shortcut keys, abbreviations and memory units in one place.
Common shortcut keys (Windows)
| Shortcut | What it does |
|---|---|
| Ctrl + C | Copy |
| Ctrl + X | Cut |
| Ctrl + V | Paste |
| Ctrl + Z | Undo |
| Ctrl + Y | Redo |
| Ctrl + A | Select all |
| Ctrl + S | Save |
| Ctrl + P | |
| Ctrl + F | Find |
| Ctrl + N | New document or window |
| Alt + Tab | Switch between open programs |
| Alt + F4 | Close the active program |
| F2 | Rename the selected file |
| F5 | Refresh |
| Windows + D | Show the desktop |
| Windows + L | Lock the computer |
| Ctrl + Shift + Esc | Open Task Manager |
Important full forms
| Short | Full form |
|---|---|
| CPU | Central Processing Unit |
| ALU | Arithmetic Logic Unit |
| RAM | Random Access Memory |
| ROM | Read Only Memory |
| BIOS | Basic Input/Output System |
| USB | Universal Serial Bus |
| GUI | Graphical User Interface |
| URL | Uniform Resource Locator |
| HTTP | HyperText Transfer Protocol |
| WWW | World Wide Web |
| Portable Document Format | |
| LAN | Local Area Network |
| WAN | Wide Area Network |
Memory units
- 1 Byte = 8 bits
- 1 KB = 1024 Bytes
- 1 MB = 1024 KB
- 1 GB = 1024 MB
- 1 TB = 1024 GB
Quick facts
- RAM is temporary (volatile) memory; data is lost when power goes off.
- The CPU is called the brain of the computer.
- Input devices: keyboard, mouse, scanner. Output devices: monitor, printer, speaker.
Practise: Computer MCQs.