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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 ...
Computer hardware. Computer hardware includes the physical parts of a computer, such as the central processing unit (CPU), random access memory (RAM), motherboard, computer data storage, graphics card, sound card, and computer case. It includes external devices such as a monitor, mouse, keyboard, and speakers. [1] [2]
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 a desk (as opposed to a portable computer) due to its size and power requirements. The most common configuration has a case that houses the power supply ...
A single-board computer ( SBC) is a complete computer built on a single circuit board, with microprocessor (s), memory, input/output (I/O) and other features required of a functional computer. Single-board computers are commonly made as demonstration or development systems, for educational systems, or for use as embedded computer controllers.
A central processing unit ( CPU ), also called a central processor, main processor, or just processor, is the most important processor in a given computer. [1] [2] Its electronic circuitry executes instructions of a computer program, such as arithmetic, logic, controlling, and input/output (I/O) operations. [3] [4] [5] This role contrasts with ...
The application software layer interfaces with the operating system, which in turn communicates with the hardware. The arrows indicate information flow. Software is a collection of programs and data that tell a computer how to perform specific tasks. Software often includes associated software documentation. [1]
Information science. Information technology ( IT) is a set of related fields that encompass computer systems, software, programming languages and data and information processing and storage. [1] IT forms part of information and communications technology (ICT). [2] An information technology system ( IT system) is generally an information system ...
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 ...