Servers

Servers are not designed to be used directly.  They make programs and data available for people hooked up to a computer network, a collection of computers connected together so that they can exchange data.

Minicomputers

Minicomputers are multi-user systems that can handle the computing needs of a smaller corporation or organization.  Many people use them simultaneously by means of remote terminals or personal computers.

Personal computers

Mainframes are huge, multi-user systems designed to handle gigantic processing jobs in large corporations or government agencies.

Supercomputers

Supercomputers are ultra fast computers designed to process hugh amounts of scientific data then display the underlying patterns that have been discovered.