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Input and Output

Input and Output. What is input?. Input is any data and instructions entered into the memory of a computer. Instructions can be entered into the computer in the form of programs, commands, and user responses

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Input and Output

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  1. Input and Output

  2. What is input? • Input is any data and instructions entered into the memory of a computer

  3. Instructions can be entered into the computer in the form of programs, commands, and user responses • An input device is any hardware component that allows users to enter data and instructions into a computer

  4. A keyboard • A keyboard is an input device that contain keys users press to enter data and instructions into a computer

  5. Type of keyboard • Wired keyboards – USB port • Wireless keyboard – Bluetooth, IrDA • Ergonomic keyboard –reduces the change of wrist and hand injuries • Keyboard for mobile devices typically are smaller and/or have fewer keys

  6. Mouse • A mouse is a pointing device that fits under the palm of your hand comfortably • A mouse can be wired of wireless

  7. Other pointing devices • Trackball • Touchpad • Pointing Stick

  8. Touch Screens and Touch-Sensitive Pads • A Touch screen is a touch-sensitive display device

  9. Microsoft surface Touch-Sensitive Pad

  10. Pen input • With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selection

  11. Other input for smart phones

  12. Game controllers • Video games and computer games use a game controller as the input device that directs movements and actions of on-screen objects • Gamepads • Joysticks and wheels • Light guns • Dance Pads • Motion-sensing controllers

  13. Digital cameras • A digital camera is a mobile device that allows users to take pictures and store them digitally • Two factors affect the quality of digital camera photos • Resolution • Number of bits stored in each pixel

  14. Voice input • Voice input is the process of entering input by speaking into a microphone • Voice recognition is the computer’s capability of distinguishing spoken words

  15. Video input • Video input is the process of capturing full-motion images and storing them on a computer’s storage medium

  16. A web cam is a type of digital video camera that enables a user to • Capture video and still images • Send e-mail messages with video attachments • Add live images to instant messages • Broadcast the images over the Internet • Make video telephone calls

  17. Video conference is a meeting between two or more geographically separated people

  18. Scanners and Reading devices • Flatbed • Pen or Handheld • Sheet-fed • Drum

  19. Optical character recognition (OCR) involves reading characters from ordinary documents • Optical mark recognition (OMR) read hand-drawn marks such as small circles or rectangles • An OMR device scans the documents and matches the patterns of light

  20. A bar code reader, also called a bar code scanner uses laser beams to read bar codes

  21. RFID (radio frequency identification) uses radio signals to communicate with a tag placed in or attached to an object • An RFID reader reads information on the tag via radio waves

  22. Magnetic stripe card readers read the magnetic stripe on the back of cards such as • Credit cards • Entertainment cards • Bank cards • Other similar cards

  23. MICR (magnetic ink character recognition) devices read text printed with magnetized ink • An MICR reader converts into a form the computer can process • Banking industry uses MICR for check processing

  24. Biometric input • Biometrics authenticates a person’s identity by verifying a personal characteristic • Fingerprint reader • Face recognition system • Hand geometry system • Voice verification system • Signature verification system • Iris recognition system

  25. What is output? • Output is data that has been processed into a useful form • An output device is any type of hardware component that conveys information to one or more people

  26. Display devices • A display device visually convey text, graphics, and video information • A monitor is packaged as a separate peripheral • Widescreen • Liquid crystal display (LCD)

  27. Liquid crystal display (LCD) uses a liquid compound to present information on a display device • Plasma monitors are display devices that use gas plasma technology and offer screen sizes up to 150 inches

  28. A CRT monitor is a desktop monitor that contains a cathode-ray tube • Have a much larger footprint than do LCD monitors

  29. Printers • A printer produces text and graphics on a physical medium • Printed information is called a hard copy, or printout • Landscape or portrait orientation

  30. Nonimpact printer • A nonimpact printer forms characters and graphics on a piece of paper without actually striking the paper • Ink-jet printers • Laser Printers • Thermal printers • Plotters • Mobile printers

  31. A multifunctional peripheral (MFP) is a single device that prints, scans, copies, and in some cases, faxes • Sometimes called an all-in-one device

  32. A thermal printer generates images by pushing electrically heated pins against the heat-sensitive paper • Thermal wax-transfer printer • Dye-sublimation printer

  33. Impact printer • Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts paper • Dot-matrix printer • Line printer

  34. Speakers, Headphones, and Earbuds • An audio output device produces music, speech or other sounds

  35. Other output devices • Other output devices are available for specific uses and applications • Data projectors • Interactive whiteboards

  36. Other output devices are available for specific uses and applications • Force-feedback game controllers • Tactile output

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