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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