The computer is of three types:
Analog computer
Digital computer
Hybrid computer
Analog computer:
The purpose of analog computers is to process analog data. Analog data is continuously changing information that lacks discrete values. When precise measurements are not required, analog computers are used, such as measuring speed, temperature, pressure, or current.
Analog computers don't need to translate the data from the measuring equipment into numbers and codes before they can use it. They produce an output that is typically a reading on a dial or scale and continuously measures changes in physical quantity. Examples of analog computers include speedometers and mercury thermometers.
Digital computer:
High-speed calculations and logical processes are built into digital computers by design. It takes raw data in the form of binary integers (0 and 1) or digits, processes it using instructions that are pre-stored in memory, and outputs the results. Digital computers are modern computers that we use at home or in the office, including laptops, desktops, & smartphones.
Hybrid computer:
A hybrid computer combines elements of digital and analog computing. It functions swiftly, like an analog computer would, and accurately, as a digital computer would, with memory. It allows for the processing of both continuous and discrete data. It receives analog signals and transforms them into digital signals before processing. For example, a processor is used in gas pumps to convert measurements of fuel flow into an amount and a price. They work in aircraft, hospitals, labs, and research centers.