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INPUT AND OUTPUT
By: Chow Mai Vang
Dr. Cagle
Spring 2006
COMM 165
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INPUT
What is Input?
According to OLeary and OLeary, inputis define as input devices that translatewhat people understand into forms thatcomputers can process.
Input is composed of date andinstructions.
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INPUT DEVICES
Again, input devices are devicesthat are able to translate what
people understand into a form thatcomputers can process.
Examples would be keyboards,
mouse, joysticks, and scanners.
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KEYBOARDS Traditional Keyboards - Full-sized, rigid,
rectangular keyboard that include function,navigational, and numeric keys
Flexible Keyboards - Fold or roll up for eachpacking or storage
Ergonomic Keyboards - Similar to traditionalkeyboards. The keyboards arrangement, howeveris not rectangular and a palm rest is provided.
Wireless Keyboards
PDAOLeary & OLeary
Copyright 2006
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POINTING DEVICES
Pointing Devices, according to OLeary& OLeary, provides a comfortable
interface with the system unit byaccepting pointing gestures andconverting them into machine-readableinputs.
Examples of pointing devices includebut are not limited to: Mouse, Joystick,
Touch Screen, and Light Pen
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MOUSE
The mouse of a computer controls the pointer thatappears on the monitor.
Examples: Mechanical Mouse, Optical Mouse,
Cordless Mouse. Mechanical Mouse - the basic mouse with a ball on
the bottom and buttons.
Optical Mouse - A mouse that has no moving ball,instead it emits and senses light to control
movements. Cordless Mouse - a mouse that has no cords and
all movement is transmitted through infrared light.
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JOYSTICK
Joysticks are normally used forcomputer games.
It controls the games movementsby pressure, speed, and directionof the joystick.
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TOUCH SCREEN
This type of monitor has a clearplastic outer layer, and behind that
outer layer are infrared beams oflight.
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SCANNING DEVICES
Flatbed Scanner - like a copy machine
Portable Canner - a hand held device that slidesacross images
Bar Code Readers - a grocery scanner
Character and Mark Recognition Devices -Scanners that are able to recognizes specialcharacters and marks
Examples: MICR, OMR, or OCR
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IMAGE CAPTURING
DEVICES Digital Cameras
Digital Video Cameras
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OUTPUT
Output is the processed of data orinformation such as text, graphics,
audio , and videos.
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WHAT IS OUPUT?
Output devices are able totranslate and processed
information into a form thathumans can understand.
Examples: Monitors, Printers, Fax
Machines, multifunction devices,and internet telephone.
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MOINTORS
Types of monitors: Cathode-ray tube
Flat-Panel E-books
Date projectors
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PRINTERS
Examples: Ink-jet printer
Laser PrinterThermal Printers
Dot Matrix
Plotters
Photo Printers
Portable Printers