This document summarizes different types of computers based on their purpose, data handling abilities, and functionality. It describes general purpose and specific purpose computers, analog, digital, and hybrid computers. It also discusses different types of computers like supercomputers, mainframes, desktops, laptops, palmtops, and workstations. The document concludes by describing the basic components of a computer including memory, storage devices, input/output devices, the central processing unit, and its main components like the arithmetic logic unit and control unit.