INPUT DEVICES
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| Key Board |
In computing, a keyboard is typewriter keyboard, which uses an arrangement of buttons or keys, to act as mechanical levers or electronic switches. After punch cards and paper tape, interaction via teletype-style keyboards became the main input device for computers.
Mice
A computer mouse is used to tell a computer what to do, including moving the cursor and choosing things on the screen.
It got its name because the wire coming out of the end of the first computer mice reminded people of the tail of a real mouse. Many mice today are wireless and use batteries.
It got its name because the wire coming out of the end of the first computer mice reminded people of the tail of a real mouse. Many mice today are wireless and use batteries.
Web Cam
A webcam is a video camera which feeds its images in real time to a computer or computer network, often via USB, ethernet or Wi-Fi.
Their most popular use is the establishment of video links, permitting computers to act as videophones or videoconference stations. This common use as a camera for the web gives the webcam its name. Other popular uses include security surveillance and computer vision.
Webcams are known for their low manufacturing costs and flexibility, making them the lowest cost form of videotelephony. They have also become the source of security and privacy issues, as some inbuilt webcams can be remotely activated via spyware.
Their most popular use is the establishment of video links, permitting computers to act as videophones or videoconference stations. This common use as a camera for the web gives the webcam its name. Other popular uses include security surveillance and computer vision.
Webcams are known for their low manufacturing costs and flexibility, making them the lowest cost form of videotelephony. They have also become the source of security and privacy issues, as some inbuilt webcams can be remotely activated via spyware.
Computer Monitor
A monitor or display (sometimes called a visual display unit) is an electronic visual display for computers. The monitor comprises the display device, circuitry, and an enclosure. The display device in modern monitors is typically a thin film transistor liquid crystal display (TFT-LCD) thin panel, while older monitors use a cathode ray tube about as deep as the screen size.
Originally computer monitors were used for data processing and television receivers for entertainment; increasingly computers are being used both for data processing and entertainment. Displays exclusively for data use tend to have an aspect ratio of 4:3; those used also (or solely) for entertainment are usually 16:9 widescreen, Sometimes a compromise is used, e.g. 16:10
Originally computer monitors were used for data processing and television receivers for entertainment; increasingly computers are being used both for data processing and entertainment. Displays exclusively for data use tend to have an aspect ratio of 4:3; those used also (or solely) for entertainment are usually 16:9 widescreen, Sometimes a compromise is used, e.g. 16:10
Speaker
A loudspeaker (or "speaker") is an electroacoustic transducer that converts an electrical signal into sound. The speaker moves in accordance with the variations of an electrical signal and causes sound waves to propagate through a medium such as air or water.
After the acoustics of the listening space, loudspeakers (and other electroacoustic transducers) are the most variable elements in a modern audio system and are usually responsible for most distortion and audible differences when comparing sound systems.
After the acoustics of the listening space, loudspeakers (and other electroacoustic transducers) are the most variable elements in a modern audio system and are usually responsible for most distortion and audible differences when comparing sound systems.
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