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A power supply unit ( PSU) converts mains AC to low-voltage regulated DC power for the internal components of a computer. Modern personal computers universally use switched-mode power supplies. Some power supplies have a manual switch for selecting input voltage, while others automatically adapt to the main voltage.
Computer hardware. PDP-11 CPU board. Computer hardware comprises 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.
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 ...
Processor (computing) In computing and computer science, a processor or processing unit is an electrical component ( digital circuit) that performs operations on an external data source, usually memory or some other data stream. [1] It typically takes the form of a microprocessor, which can be implemented on a single or a few tightly integrated ...
A military-type mobile computer housed in a reinforced case. A portable computer with three LCD screens. A portable computer with one 20.1-inch LCD screen, EATX motherboard. The MIT Suitcase Computer, MIT Digital Systems Laboratory, 1975. A portable computer is a computer designed to be easily moved [1] from one place to another, as opposed to ...
A mainframe computer, informally called a mainframe or big iron, [1] is a computer used primarily by large organizations for critical applications like bulk data processing for tasks such as censuses, industry and consumer statistics, enterprise resource planning, and large-scale transaction processing.
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 ...
As of 2024, it is the world's third-largest personal computer vendor by unit sales, after Lenovo and HP. In 2015, Dell acquired the enterprise technology firm EMC Corporation. Dell and EMC became divisions of Dell Technologies. Dell EMC sells data storage, information security, virtualization, analytics, and cloud computing.