ON THE BASIS OF WORKING PRINCIPLE

ANALOG COMPUTER:
Analog computer measures continuous types of data and uses a physical quantity like,electric current,voltage,temperature etc.to present and process the data.we have seen many Analog devices in our life.it represent numbers by a physical quantity;that is,they assign numeric values by physically measuring some actual property,such as the length of an object,an angle created by two lines,or the amount of voltage passing through a point in an electric circuit.thermometer,multimeter,speedometer,fuel and price indicator in petrol pump are the examples of Analog devices.they are special purpose computers.
DIGITAL COMPUTER:
The computer which accepts discrete data (discontinuous data)as per the electric signals is known as digital computer basically,digital computer counts digits which represent numbers or letters.they are the most widely used type of computers.the computers based on binary digits i.e.o and 1 are called digital computer.it represents each and every information(number,letter and other special symbols)in terms of single numbers (0 and 1)and processes these information by using standard arithmetic operations .90% of the computers are digital computers.they are general purpose computers.
HYBRID COMPUTER(ANALOG +DIGITAL)
Hybrid computer is the combination of the features of Analog and digital computers.it has both features of Analog and digital computer.it can do all types of tasks of digital and Analog.they are mostly used in scientific research,industrial application,aeroplanes etc.