OPERATING SYSTEM
Operating system(os) is a logical part of computer or software which may also called a user interface,which make contact between user and computer....
Exaples:
2) Windows
3) Lunix-unix
etc
Year by year it is going towards Innovation/moderation as we have example of win 98 and windows 7 they both have a big difference them ......
Soon i will publish a detailed article upon this topic