Introduction Of Computer| What Is Computer | Introduction Of Computer In Hindi |Explain About Computer |Introduction Of Computer Basic

 

Introduction Of Computer

A computer is a machine that can be programmed to accept data (input), process it into useful information (output), and store it away (in a secondary storage device) for safekeeping or later reuse. The processing of input to output is directed by the software but performed by the hardware.

A "complete" computer including the hardware, the operating system (main software), and peripheral equipment required and used for "full" operation can be referred to as a computer system.

Fig: Image Of Computer

The basic parts of a computer are as follows −

·      Input Unit 

Devices like keyboard and mouse that are used to input data and instructions to the computer are called input unit.

·      Output Unit 

Devices like printer and visual display unit that are used to provide     information to the user in desired format are called output unit.

·      Control Unit 

 As the name suggests, this unit controls all the functions of the computer. All devices or parts of computer interact through the control unit.

·      Arithmetic Logic Unit 

This is the brain of the computer where all arithmetic operations and logical operations take place.

·      Memory 

All input data, instructions and data interim to the processes are stored in the memory. Memory is of two types – primary memory and secondary memory. Primary memory resides within the CPU whereas secondary memory is external to it.

Control unit, arithmetic logic unit and memory are together called the central processing unit or CPU. Computer devices like keyboard, mouse, printer, etc. that we can see and touch are the hardware components of a computer. The set of instructions or programs that make the computer function using these hardware parts are called software. We cannot see or touch software. Both hardware and software are necessary for working of a computer.