There are several types of computers:
- Analog computers, which process continuous variables, are now rare. Hybrid computers combine analog and digital elements.
- Digital computers are most common today and operate using discrete binary digits.
- Computers can also be classified by size and power as microcomputers, minicomputers, mainframes, and supercomputers. Microcomputers include PCs, tablets, and smartphones, while mainframes are large, powerful systems used by organizations.