Hardware: the machines, wiring, and other physical components of acomputer. A digital computer’s hardware is a complex system of four functionallydifferent elements-a central processing unit, input devices, memory-storagedevices, and output devices-linked by a communication network, or bus. Thebus is usually incorporated into the main circuit board, called themotherboard, which is plugged into all the other components. The central processing unit: the part of a computer in which operations arecontrolled and executed. The heart of a computer is the central processing unit, or CPU.
In additionto performing arithmetic and logic operations on data, it times andcontrols the rest of the system. Mainframe and supercomputer CPUs sometimesconsist of several linked microchips, called microprocessors, each of whichperforms a separate task, but most other computers require only a singlemicroprocessor as a CPU. Input device: Components known as input devices let users enter commands,data, or programs for processing by the CPU. Output device: Components that let the user see or hear the results of thecomputer’s data processingMotherboard: a printed circuit board containing the principal components ofa microcomputer or other device, with connectors for other circuit boardsto be slotted into. Heat sink: a device for absorbing excessive or unwanted heat of thecomputer.Order now
Fan: an apparatus with rotating blades that creates a current of air forthe computer. RAM: random-access memoryHard disk: a rigid non-removable magnetic disk with a large data storagecapacity. CD Rom: a compact disc used in a computer as a read-only device fordisplaying data. VGA: video graphics array, a standard for defining colour display screensfor computers.
Sound card: a device which can be slotted into a computer to allow the useof audio components for multimedia applications. Modem: a device for interconverting digital and analogue signals,especially to enable a computer to be connected to a telephone line. Itcan also be used to send data. Network card: Is used to operate with a network, to operate interactively;and toInteract with others to exchange information and develop useful contacts.