Describe the categories of computers and their uses

 

Describe the categories of computers and their uses

The six major categories of computers are personal computers, handheld computers, Internet appliances, mid-range servers, mainframes, and supercomputers. These categories are based on differences in size, speed, processing capabilities, and price.

A personal computer can perform all of its input, processing, output, and storage activities by itself. Personal computers include desktop computers and notebook computers.

A desktop computer is designed so the system unit, input devices, output devices, and any other devices fit entirely on or under a desk or table. Variations of desktop computers include

·         Tower models (computers with tall and narrow system units that can sit vertically on the floor),

·         All-in-one computers (less expensive computers that combine the monitor and system unit into a single device), and

·         Workstations (more expensive and powerful computers designed for work that requires intense calculation and graphics capabilities).

A notebook computer is a portable personal computer small enough fit on your lap. Notebook and desktop computers are used at home or in the office to perform application software-related tasks or to access the Internet.

A handheld computer is a small computer that fits in your hand. Handheld computers can perform specific, industry-related functions, or can be general-purpose. A PDA (personal digital assistant) is a handheld computer that provides personal organizer functions, such as a calendar, appointment book, and notepad.

An Internet appliance is a computer with limited functionality whose main purpose is to connect to the Internet from home.

A mid-range server is more powerful and larger than a workstation computer. Users typically access a mid-range server through a personal computer or a terminal, which is a device with a monitor and a keyboard that usually has no stand-alone processing power.

A mainframe is a large, expensive, very powerful computer that can handle hundreds or thousands of connected users simultaneously.

A supercomputer is the fastest, most powerful, and most expensive category of computer.