Types of Computers

Types of Computers

On the Basis of work: - 

A. Analog Computer
B. Digital Computer
C. Hybrid computer

A.          Analog Computer

Analog Computer measure temperature, voltage, current and pressure.
1. Accuracy low.
2. Storage capacity low.
3. Analog computer cannot re program or if we need to be re programmed the where circuit and hardware part to be required with news to ones.
4. Low cost.

Analog Signal

B. Digital Computer

1. Digital comput er work with binary digits.
2. Accuracy high then analog.
3. Storage capacity high then analog.
4. These computers are totally fixable and can be reprogrammed.
5. Digital computer converts the data in two digits. 

Fig No 3:- Digital Signal 

C. Hybrid Computer

1. Combination of analog and digital called hybrid.
2. It can perform the function of both analog and digital.
3. In hybrid computer have analog signals to digital and digital to analog convertor. Hybrid computers are used in hospital, Jet planes, Industry etc. 

On The Basic Of Size.

Super Computer:- 

Super computer are very powerful, multiprocessor or most expensive computers. These types of computers are used in supermarket, shopping mall etc. 

1. More processers are connected in super computer.
2. Expensive and powerful then other computer.
3. Processing speed high.
4. Storage capacity high.

Mainframe computer:-

They are medium or large machine made of several units connected together. Mainframe computers are generally used in big organization and government department for large scale of data processing. It can calculate millions of bytes per second. E.g. IBM1401.

1. Processing speed low then super computer.
2. More people communicate at a same time.
3. Used to engineering, scientific research etc.

Mini Computer:-

They are like a small mainframe computers. They consist of few separate unit connected together, they can maintained and operated by people who are not computer expert. They can process information at they are four million bytes per second. They are not so powerful and generally they are used in small organization, government department etc. E.g. Prime9755.

1. The third generation called minicomputer.
2. Small then super and mainframe but large then micro computer.
3. Less powerful then super and mainframe but more powerful then micro.
4. Used to data processing, programming. 

Micro Computers:-

They are the smallest general purpose computers. They are some size of type-writer; they contain a small CPU which is known as microprocessor. These computers are also known as personal computers and they are used by single person at a time.

1. Using single micro processor.
2. Manufactured with 16bit or 32bit micro processor.
3. Micro computer also called Personal computer.
4. Used in many fields in business, Education, Desktop designing, programming.

Based on Brand

Computers are classified in terms of brands also. Many companies are involved in manufacturing of computers throughout the world. On the basic of brand computers are divided in to three types.
1. IMP PC
2. IMP compatible
3. Apple/Macintosh
1. IBM PC: - It stands for international Business Machine Personal Computer. It is one of the leading companies in the world which was established in 1924 in USA. The computer manufacturing by IBM Company is called IBM computers and the micro computers manufactories by IVM computers called IBM PC.

1. Manufactured by IBM Company.
2. IBM Company called IBM computer.
3. IBM is one of the leading companies in computer manufacturing.
4. Quite expensive than other computer. 

2. IMB compatible: - A computer that has the same functional characteristics and principle of IBM computer. They are called IVM compatible. All the software and program which run in IBM compatible. These computers are cheaper and most popular because there parts are easily available in the market.

1. IBM companies clone are called IBM compatible.
2. Less powerful then original IBM.

3. Apple and Macintosh:- The computer manufactured by apple company with different architecture is called Apple Computers. It was established in 1970 in USA. The Apple computers uses their own hardware and own software. These computers are some way different from IBM computer because the software used in apple computer does not run in IBM computer. The advanced version of apple computer is known as Macintosh.

1. Manufactured by Apple Company.
2.  Used for desktop designing.
3. They are original and quite expensive then IBM and IBM compatible

On the Basic Of Model:-

1. XT
2. AT
3. PS/2


1. XT : - (Extra/Extended Technology)

Those computers which have 8086, 8088 microprocessor they are called XT computers. They had processing speed is 4.77 Mhz. and they cannot run advanced version of software.

2. AT: - It stands for Advanced Technology computers and those computers which have 80286, 80386, 80486, 80586 microprocessor, they are known as AT computers. They have large capacity of memory so they can run advanced version of software and mostly they are used to perform mathematical operation.

3. PS/2: - It stands for Personal Computer; IBM company started manufacturing next model of computer in 1990, which is small in size and they portable because they can run any types of software, because there speed is more than other computers.