Set of logical information known as data
A set of instruction written in data language which computer can understand Set of instruction is known as program .it will make the computer do computer set of action.
A set of Program is known as Software. Install in computer with the help of floppy/cd/dvd.
- We can give 255 character in folder name
- Light pen is attach to the VDU (visual display unit) its not safe.
- OCR- Optical Character Reader is able to read or recognize word which read with the help of computer.
- OMR-Optical Magnetic Character reader is able read to read /recognizes words which write with the help of pencil OMR is use in form, Objective Sheet.
- DVD-Digital Video Disk it is larger 4.7 GB to 17.1 GB
- Pen Drive this is USB Memory, Jump Memory, Micro Drive, USB flash Drive, and USB Key.
- 1024 Bytes =1 KB
- 1024 KB =1 MB
- 1024 MB =1 GB
- 1024 GB =1 TB
Virus is a one type of program .It can be harmful for your system.
Name of virus
- happy Birthday
- I love you
Name of Antivirus:-
- Norton Antivirus
- Smart DOG
- QUICK HILL
Alt+Tab Jump one window last open window
Start+D all window which are open those all of minimize