Computer: Lecture no 1

CDC

COMPUTER DEVELOPMENT CONCEPT

                                             

<!--[if !supportLists]-->v COMPUTER DEFINATION

Computer is an Electronic Device which accept Data  from the User with the help of an Input devices then Store it, Process it ,  Share it and Retrieves its result onto an Output devices.

 

 

 

<!--[if !supportLists]-->v <!--[endif]-->Block Diagram Of  Computer

Input Devices

R A M C P U

Output Devices

<!--[if !supportLists]-->1.   <!--[endif]-->RAM  stands for Ran dam Access Memory.

<!--[if !supportLists]-->2.   <!--[endif]-->CPU    stands   for Central Processing Unit

 

<!--[if !supportLists]-->v <!--[endif]-->Input Devices

       

         These   Devices are used to enter the Data in the Computer.

         Exp:  Mouse, Keyboard, Joy Stick, Touch Screen,  Mic, Scanner, Track ball ,

         Light pen etc,

 

<!--[if !supportLists]-->v <!--[endif]-->Output  Devices

These devices are used to received the Data from the Computer.

Exp: Monitor, Printer , Plotter , Projector, Speaker etc.

 

<!--[if !supportLists]-->v <!--[endif]-->Types  Of   Computer

There   are Two Main types of Computer.

<!--[if !supportLists]-->ó <!--[endif]-->Dedicated Computer

They are design for   Special purpose.

They can perform only one job at a time.

Exp: Missile Control Machine etc

<!--[if !supportLists]-->ó <!--[endif]-->Non Dedicated Computer

They are design for General purpose.

They can perform multiples jobs at a time.

Exp: PC (Personal Computer)

            

<!--[if !supportLists]-->ó <!--[endif]-->Basic  Types  Of  Computer

   

               There are Three  basic types of  Computer.

<!--[if !supportLists]-->ó <!--[endif]-->Digital Computer

<!--[if !supportLists]-->ó  <!--[endif]-->Analog Computer

<!--[if !supportLists]-->ó Hybrid Computer

<!--[if !supportLists]-->Ø <!--[endif]-->Digital Computer

They can  perform mathematical calculation.

They can accept data in the form of digits .

Exp: +, - , *, /

<!--[if !supportLists]-->Ø <!--[endif]-->Analog Computer

They can Measure the physical Quantities.

Exp: Temperature, pressure etc.

 

<!--[if !supportLists]-->Ø Hybrid Computer

Word  hybrid means Mixture or combination.

This type of computer is the combination of Digital and Analog Computer.

Exp: Petrol Pump, ECG