The document discusses different ways to classify computers. Computers can be classified based on their purpose, the type of data they process, or their processing capacity. In terms of purpose, there are general purpose computers that can perform many tasks, and specific purpose computers designed for a single task. When classified by data type, there are analog computers that process continuous data, digital computers that process numeric data, and hybrid computers that have properties of both. Classification by capacity considers a computer's processing power, memory size, and functional capabilities. The document provides examples of analog computers and explains the differences between analog and digital computers.