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2. Computer - Wikipedia

   en.wikipedia.org/wiki/Computer

   A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations ( computation ). Modern digital electronic computers can perform generic sets of operations known as programs. These programs enable computers to perform a wide range of tasks. The term computer system may refer to a nominally ...

3. Desktop computer - Wikipedia

   en.wikipedia.org/wiki/Desktop_computer

   A desktop computer system. It has a monitor, keyboard, mouse, speakers, and a computer tower. The computer tower contains the motherboard and processor. A computer lab with desktop PCs with flat-panel monitors. A desktop computer (often abbreviated desktop [1]) is a personal computer designed for regular use at a stationary location on or near ...

4. Personal computer - Wikipedia

   en.wikipedia.org/wiki/Personal_computer

   An artist's depiction of a 2000s-era desktop-style personal computer, which includes a metal case with the computing components, a display monitor and a keyboard (mouse not shown) A personal computer, often referred to as a PC, is a computer designed for individual use. [1] It is typically used for tasks such as word processing, internet ...

5. Laptop - Wikipedia

   en.wikipedia.org/wiki/Laptop

   Laptop. A laptop computer or notebook computer, also known as a laptop or notebook, is a small, portable personal computer (PC). Laptops typically have a clamshell form factor with a flat-panel screen on the inside of the upper lid and an alphanumeric keyboard and pointing device on the inside of the lower lid.

6. Classes of computers - Wikipedia

   en.wikipedia.org/wiki/Classes_of_computers

   Classes of computers. Different types of computers – clockwise from top left: Desktop computer (IBM ThinkCentre S50 with monitor) Smartphone ( LYF Water 2) Supercomputer (IBM Blue Gene/P) Video game console (Nintendo GameCube) Computers can be classified, or typed, in many ways. Some common classifications of computers are given below.

7. Operating system - Wikipedia

   en.wikipedia.org/wiki/Operating_system

   An operating system ( OS) is system software that manages computer hardware and software resources, and provides common services for computer programs . Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time, mass storage, peripherals, and ...