Computer Basic

Good evening friends,
First of all i am really very sorry for not showing any new post since long time.As in this blog i want to provide you some general knowledge tips so in this post i want to share computer basic knowledge which necessary in any qualifying exam.
Friends,
Charles Babbage was the father of computer.Thare are basically five generation of computer.first computer was very big as room size which use vacuum tube.After this ic chips ,then transistors comes in existence.As development grow the size of computer reduces as efficiency increase.Now l.c.d,laptop,notebook comes in market.Computer has basically three main parts:-
1.Output unit:-It is also called visual display unit.It is used to show output to user.Monitor,printer are example of it.

2. Central processing unit:-it is also called brain of computer.It also contain memory unit,arithmetic and logical unit and control unit.

Input unit:-It takes input from your for showing output.Ex .keyboard ,mouse,joystick etc.
Now our concern is on that is computer is a hardware or software?
Friends,computer system by just seeing is a hardware like c.p.u,u.p.s,moniter ,speakers ,printer etc but set if program which helps in operate machine called software.Hardware can be touched but software can't.Hardware can be damaged or destroy but software only obslete means new advancement in technology can replace old one.If we want to set two system then for each system ti be setup require different hardware but same software can be coppied into different system.Computer understand binary language of 0,1.For understanding it four number system require:-
1.Binary number system
2.Octal number system.
3.Hexadecimal number system.
4.Decimal number system.
We will discuss number system basics in next post.
Stay in touch.Thanks.