TYPES OF HARDWARE INTERFACESINPUTANDOUTPUT

INPUT DEVICESany peripheral (piece of computer hardware equipment) used to provide data and control signals to an information processing system (such as a computer)

KEYBOARDpartially modeled after the typewriter keyboard, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switchesIn normal usage, the keyboard is used to type text and numbers into a word processor, text editor or other program.

MOUSEis a pointing device that functions by detecting two-dimensional motion relative to its supporting surfaceconsists of an object held under one of the user's hands, with one or more buttons

WEBCAMvideo capture device connected to a computer or computer network, often using a USB port or, if connected to a network, ethernet or Wi-Fimost popular use is for video telephony, permitting a computer to act as a videophone or video conferencing stationOther popular uses, which include the recording of video files or even still-images, are accessible via numerous software programs, applications and devices.

SCANNERdevice that optically scans images, printed text, handwriting, or an object, and converts it to a digital imageCommon examples found in offices are variations of the desktop (or flatbed) scanner where the document is placed on a glass window for scanning.

OUTPUT DEVICESany piece of computer hardware equipment used to communicate the results of data processing carried out by an information processing system (such as a computer) to the outside world

SPEAKERComputer speakers, or multimedia speakers, are external speakers, commonly equipped with a low-power internal amplifier.Enables the user to hear sound output from the computer

PRINTERperipheral which produces a hard copy (permanent readable text and/or graphics) of documents stored in electronic form, usually on physical print media such as paper or transparencies

MONITORpiece of electrical equipment which displays images generated by devices such as computers, without producing a permanent recordcomprises the display device, circuitry, and an enclosure

LCD PROJECTORtype of video projector for displaying video, images or computer data on a screen or other flat surfaceTo display images, LCD (liquid crystal display) projectors typically send light from a Metal halide lamp through a prism that separates light to three poly silicone panels – one each for the red, green, and blue components of the video signal.

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