This document classifies computers based on their size, technology, and purpose. The main types of computers discussed are microcomputers, workstations, minicomputers, mainframe computers, and supercomputers. Microcomputers are the most common and include desktops, laptops, and tablets. Workstations are powerful single-user computers used for tasks requiring significant processing power. Minicomputers are more powerful than microcomputers and can support multiple users. Mainframe computers are very large and powerful machines that can support hundreds or thousands of users. Supercomputers are the most powerful and expensive computers used for advanced tasks like weather forecasting.