The document discusses different types of computers. It defines a computer as an electronic device that accepts instructions, manipulates information, displays data, and stores data. Computers have two main parts - hardware consisting of physical components, and software like operating systems and programs. The document describes common computer types including desktops, laptops, netbooks, servers, tablets, phones, game consoles and TVs. It notes that personal computers come in PC and Mac varieties, which have different operating systems and incompatible software.