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• Input


  Data or instructions entered into the memory of a computer
• Input device


  Any hardware component that allows users to enter data and instructions
• Types of keyboards


  • Enhanced Keyboard
  • Cordless Keyboard
  • Inbuilt Keyboard
  • Portable Keyboard
  • Ergonomic Keyboard
• Enhanced Keyboard


  • Normal keyboard for personal computers having 12 functions keys on the top, 2 ctrl keys, 2 alt keys etc.
• Cordless Keyboard


  • Battery-powered device that transmits data using wireless technology
• Inbuilt Keyboard


  • Like enhanced keyboard but it is built in for Laptops, Notebooks etc.
• Portable Keyboard


  • Pocket sized portable keyboard, which can attach and remove from a handheld computer
• Ergonomic Keyboard


  • With ergonomic considerations to minimize muscle strain, fatigue, and other problems
• Mouse


  Pointing device that fits under the palm of your hand, controls movement of pointer
• Mechanical mouse


  • Has rubber or metal ball on its underside
• Types of mouse


  • PS/2 Mouse
  • Serial Mouse
  • USB Mouse
  • Cordless Mouse
• PS/2 Mouse


  • The PS/2 connector used by this type of mouse is the same as the PS/2 connector used by the keyboard
• Serial Mouse


  • Connects to the System Unit using a DB-9 female connector
• USB Mouse


  • Powered by a USB connecting cable
• Cordless Mouse


  • Connected via Bluetooth or infrared
• Optical Mouse


  No moving mechanical parts inside, senses light to detect mouse's movement, more precise than mechanical mouse, more expensive than a mechanical mouse
• Trackball


  Stationary pointing device with a ball on its top or side, to move pointer, rotate ball with thumb, fingers, or palm of hand
• Touchpad


  Small, flat, rectangular pointing device sensitive to pressure and motion
• Pointing Stick


  Pointing device shaped like pencil eraser positioned between keys on keyboard
• Light Pen


  Handheld input device that can detect the presence of light, press light pen against screen surface and then press button on pen
• Touch Screen


  Used in most modern computers, kiosks, phones etc., reduces the effort made when using keyboard and mouse
• Gaming and Media Player Controllers

  • Gamepad
  • Joystick
  • Wheel
  • Light gun
  • Dance pad
  • Motion-sensing game controller
• Voice Input


  Entering input by speaking into a microphone, voice recognition or speech recognition is the computer's capability to distinguish spoken words
• Audio Input


  Entering sounds into a computer - speech, music, and sound effects, MIDI - standard defining how digital musical devices represent sound electronically
• Digital Camera


  Allows you to take digital pictures/videos, images viewable immediately on camera, download to computer, post pictures to Web
• Scanners and Reading Devices

  Devices that make the input process more efficient by eliminating the manual entry of data, capture data from the source document
• Types of Scanners


  • Optical Scanner
  • Optical Character Recognition (OCR)
  • Optical Mark Recognition (OMR)
  • Bar Code Scanner
  • Magnetic Ink Character Recognition (MICR) reader
• Optical Scanner


  Light sensitive input device that reads printed text and graphics and then transmits the results into a form the computer can understand
• Optical Character Recognition (OCR)

  Technology that involves reading typewritten, computer printed or handwritten characters from ordinary documents and translating them into a form that the computer can understand
• Optical Mark Recognition (OMR)


  Devices that read hand-drawn marks such as small circles or rectangles
• Bar Code Scanner


  Uses laser beams to read barcodes, a barcode is a set of vertical lines and spaces of different widths
• Magnetic Ink Character Recognition (MICR) reader


  Used to read text printed with magnetized ink, exclusively used in the banking industry for check processing
• Input as Services


  • Point Of Sale (POS) Terminal
  • Automated Teller Machine (ATM)
• Point Of Sale (POS) Terminal


  Records purchases, processes credit or debit cards, and updates inventory
• Automated Teller Machine (ATM)


  Self-service banking machine that connects to a host computer through a network
• Security


  Fingerprint scanner captures curves and indentations of a fingerprint for the user to gain access to a device and or applications
• Output


  Presentation of processed data, can be text, graphic, audio, or video
• Output Display Devices - Monitor

  • CRT Monitors
  • Flat-Panel Display Devices
  • High Definition Television
• CRT Monitors


  • Cathode Ray Tube monitors, popular for desktop computers
• Flat-Panel Display Devices

  • Flat-panel Liquid Crystal Display (LCD) models, used mostly for portable computers but also used with desktop computers, expensive but take up less desk space, give out no radiation and do not flicker