types-of-computer

Chapter 2: Types of computer

Jul 10, 2025 SAROJ BHATTARAI 5,799 views

Classification of computer: Depending upon the use and advancement of technology computer are categorized in 4 different types:

Classification of computer
Basis of Operation	Basis of performance and size	Basis of brand	Basis of model
Analog computers	Super computer	IBM PC	XT
Digital computers	Mainframe computer	IBM compatible	AT
Hybrid computers	Mini computer	Apple MacIntosh	PS/2
	Micro computer

Differentiate between analog and digital computers with examples.

Analog computer	Digital computer
They measure physical quantities such as speed, temperature.	They run on digital data (BITS) 0 and 1.
Analog signal are continuous in nature.	Digital signal are discrete in nature.
Analog computers are approximate (less accurate)	Digital computer are more accurate.
They are specific purpose computers.	They can be both specific as well as general purpose computers.
They are cheaper and have low storage.	They are expensive and higher storage.

Define micro computers. Explain its types in brief.

Micro computers are the smallest and most portable computers present these days. Due to its size, cheap cost and versatility they are used in homes offices and business to perform different types of jobs. Micro computers use micro processor as their major processing units. There are three types of micro computers:

a. Desktop computers: These portable computers are also called personal computers (PC). They are so portable that fix in the desk of the user. They are general purpose computers which can be use to perform several varieties of work.

b. Laptop computers: They are the most portable micro computer that exist today. They can easily carried from one place to another place easily. Since, they can run on battery also they can be carried to any place of work.

c. Handheld/Palmtop: Handheld/Palmtop or Personal Digital Assistant (PDA) are the small battery powered device which can be used a computing device to store address, schedule appointment, take notes or even play games. The handheld devices this days has more functionality and use touch screen technology.

Key point:

First computer brought in Nepal was IBM 1401 in 2028 BS for population census which was a mainframe computer.

IBM company was originally a tabulating machine company established by Dr. Herman Hollerith.

IBM PC are the branded computers manufactured by IBM company.

IBM compatibles are duplicate of IBM often called assembled computers.

Apple computer have their own hardware and software.