Block Diagram Of Computer System


Block Diagram Of Computer System – A typical computer system irrespective of its size, class or type consists of hardware and software, integrated and synchronized together to perform computational work or data processing. Computer Anatomy is concerned with the way the various functional units operate and how they are connected together to form the computer system.

Block Diagram Of Computer System

A computer system consists of the following functional units – 

  1. Input Unit 
  2. Memory / Storage Unit
  3. CPU (Central Processing Unit) 
  4. Output Unit

The Block Structure of a Computer is Shown In Figure depicts the working of computer and it’s various functional units. 

1. Input Unit 

As the computer process, the data according to the instructions given to it and produces the results. The input unit is used to feed the data as well as instructions to the computer. The commonly used input devices are keyboard, mouse, scanner, joystick, etc. 

   In brief, an input unit performs the following functions – 

  • It accepts or reads the list of data and instructions from the user. 
  • It converts these data and instructions in computer acceptable form. 
  • It supplies the converted data and instructions to the computer system for further processing. 

2. Memory (Storage Unit) 

The basic function of this unit to store the data, instructions and final results in the system so that it can deliver them on demand to the user or other computer units at a later time. The data and instructions are transferred to other computer units or devices from the main storage under the supervision of the control unit. It also referred to as primary Storage. Read More

3. Central Processing Unit (CPU) 

CPU is considered as the brain of the Computer. It is also called a microprocessor. It is the fastest and costly unit of the computer system. All major calculations and comparisons are made inside the CPU. CPU Converts all the supplied input into the required output as per the instructions supplied by the user. The performance and the speed of the computer mainly depend upon the type of microprocessor installed in it. Read More

4. Output Unit

Output Unit – During Data processing, the Computer process the data according to the instruction applied to it and produce the result or Output. The Output Unit is used to provide the results to the user. The Commonly used output devices are monitor or VDU (Visual Display Unit), Printer, plotter, speakers, etc. 

In brief, an output unit performs the following functions – 

  • It accepts the results produced by the computer that is in binary form. 
  • It converts these binary-coded results to human acceptable. 
  • Finally, it supplies the converted results to the user. 

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