Classification of Computer

Based on Size: Based on size the computer is classified in to four types.

1.     Micro Computer

2.     Mainframe Computer

3.     Mini Computer

4.     Super Computer

1.    Micro Computer:

·        It is small in size and less expensive.

·        It is the most growing type of computer and it is portable.

·        It is less powerful.

·        It is consist of three basic physical equipment.
1. System Unit (CPU)
2. Input/output Unit-Keyboard, Mouse, etc./Monitor, Printer, etc.
3. Memory unit

Types of Micro Computer:

                                           i.            Desktop Computer/ PC:

·        It is small in size and less expensive type of computer.

·        It is based on the microprocessor technology (Integrated Circuit)

                                        ii.            Note Book Computer:

·       It is also called as Ultrabook computer or Laptop computer.

·       It is developing by “Alan Kay”.

                                     iii.            Hand Held Computer:

·       The hand held computer fit in to size palm so it is called as palm tap of PDA (personal Digital Assistance)

·       It accepts the data through a pen in place of keyboard.

·       It supports calendar and phone book.

                                      iv.            Tablet:

·       It is just like the laptop computer.

·       It accepts data from the user through a pen or touch screen in place of mouse or keyboard.

·       Its screen size start from 7 inch.

                                        v.            Smart Phone:

·       It is used as both phone and a small PC.

·       Touch screen is used as a for inputting data and either mouse and keyboard also used for entering data.

·       Some manufactures are apple, blackberry, Sony, etc.

2.    Main Frame Computer:

·        The mainframe computer having large size, large storage capacity and the range of software is very high.

·        It is very faster than microcomputer.

·        It is the backbone of the entire business work.

·        It works in network and terminal that allow a number of computers work together at the same time.

·        Some name of main frame computer IBM-370, IBM-s/390, UNIVAC-1110

3.    Mini Computer:

·        It is faster than mainframe computer.

·        It is less expensive than the mainframe computer.

·        It is design to perform some specific task like CAD (Computer Aided Design) calculation, Engineering and Hospital.

·        Example- IBM-17, DEC POP-11, HP-9000

4.    Super Computer:

·        The super computer having large storage capacity large in size and it speed is very high as compare to other computer.

·        Its processing speed is very high as compare to other computer.

·        Its processing speed in measure in FLOPS- (Floating Points Per Second).

·        It is used for scientific research, military agency, weather forecasting.

Classification of Computer Based on Purpose:

Based on purpose the computer are classified in to two types.

                    I.            General Purpose

                 II.            Special Purpose

I.                   General Purpose:

The general purpose computer uses to solve the variety of problems by changing its program and instruction.

Example- Calculation, Database Management, Accounting, etc.

II.                Special Purpose:

This type of computer is use to solve a single dedicate type of problem.

Example- Automatic air craft landing.

Five basic operation perform by any computer system

1.     Inputting

2.     Storing

3.     Processing

4.     Outputting

5.     Controlling

1.    Inputting:

·        It is the process (Method) of entering the data in to the computer system by the user help of input devices.

·        Some example of input devices is Keyboard, Mouse, Joystick, Scanner, MICR, OMR, BCR, voice input and recognition system.

2.    Storing:

·        It is the process of store enter data by the user in to the computer main memory or RAM for later manipulation.

·        RAM is used for main memory or primary memory and hard disk, Floppy disk, Pen drive, etc. are used for secondary storage.

3.    Processing:

·        It is the process of performing operation that is both mathematical and logical on the data enter by the user in to the computer and generate necessary information as a result.

·        The processing operation is done inside the CPU.

4.    Outputting:

·        It is the process of showing result to the user either in a computer screen or in a printed format.

·        Some example of output device is Monitor, Printer, Speaker, etc.

5.    Controlling:

·        It is the process to directs all the above processes.

·        It controls and maintain order the all the operation of the enter computer system.

·        It is fitted inside the CPU.

·        It controls how the accurate result is gain.