Explain a few of the different ways in which computers can be categorized

Mainframe Computers

Used by large organizations, these computers tend to be considerably physically bigger than other computers, and their primary uses involve complex mathematical operations in bulk quantities. You can find these in meteorological institutes, statistical institutes, etcetera.

The term "mainframe" refers, broadly, to any computer that works as the head of many other smaller, usually more precise, computers.

Supercomputers

Similar to Mainframe Computers, these are computers that handle huge amounts of work and a great number of heavy calculations simultaneously. Used on big engineering projects, economic forecasts, etc..

Minicomputers

These are mainly used by business to maintain several accounts and finances in general. They can handle the workload of a 100 or more different users at the same time.

Microcomputers, a.k.a. Personal Computer, a.k.a. PCs

These are the most commonly known computers, and are meant for public use. Among microcomputers, the best known model is the Desktop Computer, which usually comprises a C.P.U, a monitor and peripherals, such as keyboards, mice, speakers and so on.

Besides Desktop PCs, these are some of the other types of microcomputers commonly used:

• Tablet PCs
• Laptops
• Notebooks
• Netbooks
• Hand-held Computers
• Work Stations