There are two types of computer-based on principle of operation. They are:

1.Digital Computer:

The Digital computer is the first types of computer which is capable of solving problems by processing information in discrete form.
It uses binary code i.e., 0 and 1. These two digits stand for true and false, no and yes, left or right. Furthermore, these two digits are used to compute all instructions and operations of the digital computer. These computers are noise-free and high accuracy. Everything that a digital computer does is based on one operation: the ability to determine if a switch, or “gate,” is open or closed. Digital computer speed and calculating power are further enhanced by the amount of data handled during each cycle. The speed at which the computer performs this simple act, however, is what makes it a marvel of modern technology.

 

2.Analog Computer

Analog computer is a form of computer that uses the continuously changeable aspects of physical phenomena such as electrical, mechanical, or hydraulic quantities to model the problem being solved. A type of computer which functions continuously, no matter what the variations are in the input. These variations may include instability in current, temperature, electric and mechanical parts. The best examples of an analog computer are Oscilloscopes, thermostat, and thermometer. In the beginning, the analog computer was mostly used for the purpose to calculate the electrical signal, voltage, resistance of the capacitor, etc. It is not easy to work with the analog computer. Large numbers of electrical, mechanical peripheral and supporting devices are needed in order to function it accurately.

Among the different types of computer people widely used is the digital computer.

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