There are three types of computer on the basis of construction.
Analog computer
Analog computer represent physical quantity in the form of wave or in continuous form. they provide us continuous information. The speed of analog computer is fast and difficult to operate. They have vey small memory. These compute became the base of digital computer. These computer constructed to do a specific jobs and to respond vey quickly to change in the measurement of inputs.
Example
Weight machine
Speedo meter
Digital computer
Digital computer represent physical quantity with the help of symbol or number and provide us discrete information .In digital computer mathematical number represent as binary digits(0,1) and all operation are done using binary digits.
Use
Digital computer operate as electric inputs they have ON and OFF. These computer are widely used in commercial and control system.
Hybrid computer
The computer with combined features of digital and analog computer is called hybrid computer. In these computer output can be either in the form of numbers or required units of measurement. Hybrid computer can produce high accurate and precise result.
Use
These computer used in robotics, scientific research labs, hospitals, cars, industries, and control system.