The document defines and compares different types of computers:
- Analog computers measure continuous physical quantities like temperature and pressure, while digital computers represent input as numbers and perform logical/arithmetic operations.
- Microcomputers are the smallest systems ranging from calculators to desktops, using microprocessors. Mini computers are more powerful than microcomputers and used for departmental/network systems.
- Mainframe computers offer high-speed processing and storage and function as central database servers. Supercomputers are designed for scientific tasks and contain multiple parallel CPUs, making them the fastest but most expensive computers.