Input Devices - by Anil kumar
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The document discusses several common input devices for computers: keyboard, mouse, scanner, webcam, microphone, joystick, and others. It provides brief descriptions of each device, including who invented them and common uses. The keyboard is the most commonly used input device and contains alphanumeric and function keys. The mouse was invented by Douglas Engelbart and contains left, right, and scroll buttons. A scanner is used to scan documents for editing. A webcam allows real-time video transmission over networks. Microphones have various applications including phones, recording, and broadcasting. A joystick is similar to airplane controls and used for games.
Input Devices - by Anil kumar
- 1. SAVICOMPUTERSCIENCECLUBGOVERNMENT SCIENCE COLLEGENRUPATUNGA ROAD, BANGALORE - 560001
- 3. Some of the input devices are:-KeyboardMouseScannerJoystickWebcamMicrophoneOCR- Optical Character ReaderMICR- Magnetic Ink Character Reader
- 4. keyboardThe most commonly used input device is Keyboard.Key board is invented by Mr.Sholes.Normal keyboard contains 101 to 108 keys.Multimedia keyboard has 124 keys.Keyboard is logically divided into 3 parts.Alphanumeric keys. Special keys. Functional keys.
- 5. mouseMouse is also called as Pointing device.Mouse is invented by Douglas Engelbert at the Stanford Research Institute.Mouse consists of 3 buttons.Left buttonRight button &ScrollerThere are two types of mouse.Optical mouse &Roller mouse
- 6. scannerScanner is also an input device which is used to scan the document & edit the same.Uses Scanner is a device which is used in nuclear radiation , magnetic fields, sound waves or light to examine interior or exterior surfaces or tissues..
- 7. WebcamWebcam was first developed in CambridgeUniversity, Computer Science Department in1991.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 video conference stations.Other popular uses include security surveillance & computer vision.
- 8. microphoneIn 1876, Emile Berliner invented the first microphone used as a telephone voice transmitter.Microphones are used in many applications such as TelephonesTape recordersHearing aidsSpeech recognitionMotion pictures productionLive & recorded audio engineeringIn computers for recording voiceMegaphonesIn radio & television broadcasting
- 9. JoystickJoystick is also an input device.It is similar to controlling device in airplane. It is used to play games.
- 10. Thank you