CHAPTER

7777CH

AP

TE

R

INPUT AND OUTPUT

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Competencies

Define input

Describe keyboard entry, pointing devices, & scanning devices

Discuss image capturing devices, digitizing devices, & audio input devices

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Competencies cont.

Define output

Describe monitors, printers, and audio output devices

Discuss combination input & output devices

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What is Input?

Any data or instructions used by a computer

Input devicesHardware

Keyboards

Mice

Scanners

Other devices

Translates data into a form that the system unit can process

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Keyboard Entry

KeyboardsTraditional keyboards

Flexible keyboards

Ergonomic keyboards

Wireless keyboards

PDA keyboards

FeaturesTypewriter keyboard with numeric pad

Special purpose keys

Toggle and combination keys

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Traditional Keyboard

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Pointing Devices

MouseMechanical

Optical

Cordless or wireless

Joystick

Touch Screen

Light Pen

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Scanning Devices

Optical scannersFlatbed

Portable

Bar code readersHandheld wand readers or platform scanners

Contain photoelectric cells that read bar codes

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Scanning Devices

Character and mark recognition devices

Scanners that recognize special characters & marks

Magnetic ink character recognition (MICR)

Optical-character recognition (OCR)

Optical-mark recognition (OMR)

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Image Capturing Devices

Digital cameraImages recorded digitally on a disk

Images can be downloaded to a computer

Digital video camera Records motion digitally

Can take still images as well

WebCamsSpecialized digital video cameras

Broadcast images over the Internet

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Digitizing Devices

Graphics Tablets

Digital Notepads

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Audio Input Devices

VoiceVoice recognition systems

Discrete-speech recognition systems

Continuous-speech recognition system

MusicMusical Interface Digital Interface (MIDI)

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What is Output?

Processed data or information

Types of outputText

Graphics

Audio & video

Output devicesMonitors

Printers

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Monitors

Known as screens or display screens

Output referred to as soft copy

Features Resolution

Dot pitch

Refresh rate

Size

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More on Monitors

Cathode-ray tube or CRTs

Flat-panelLiquid crystal display (LCD)

Portable and thinner than CRTs

Other monitorsE-books

Data projectors

High-definition television (HDTV)

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Printers

Translates information that has been processed by the system unit

Output referred to as hard copy

FeaturesResolution

Color capability

Speed

Memory

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Printers

Ink-jet printer

Laser printerPersonal laser printers

Shared laser printers

Thermal printer

Other printersDot-matrix

Plotters

Photo printers

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Audio Output Devices

Translates audio information into sounds that people can understand

Common devicesSpeakers

Headphones

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Combination Input and Output Devices

Fax machines

Multifunction devices

Internet telephonesTelephony

Voice-over IP (VoIP)

Terminals

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Terminals

An input and output device

Connects to a mainframe or server

Types of terminalsDumb terminal

Intelligent terminal

Network terminal

Internet terminal

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A Look to the FutureNeural Signals Inc.

Brain machine interface

Allows humans to control machines with their thoughts

Individuals incapable of communication

Physically immobile people

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Key Terms

active matrix monitor (190)audio input device (185) audio-output device (193) bar code (183)bar code reader (183) bar code scanner (183)cathode ray tube monitor (CRT) (189)

character recognition device (183)

clarity (189)

color capability (printer) (191)

combination device (193)

combination key (175)

continuous-speech recognition system (188)

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Key Terms

cordless mouse (180)data projector (190)digital camera (184)digital notepad (185)digital video camera (184)digitizing device (185)discrete-speech recognition system (188)display screen (189)

dot-matrix printer (192)dot pitch (189)dots-per-inch (dpi) (191)download (184)dual-scan monitor (190)dumb terminal (195)e-book (190)e-book reader (190)

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Key Terms

facsimile (fax) machine (194)

flat-panel monitor (190)

Flatbed scanner (183)

graphics tablet (185)

hard copy (191)

Headphones (193)

high-definition television (HDTV) (190)

host computer (195)

image capturing device (184)

ink-jet printer (191)

input device (178)

input (178)

intelligent terminal (195)

Internet telephone (194)

Internet telephony (194)

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Key Terms

Internet terminal (195)

IP Telephony (194)

joystick (181)

keyboard (178)

laser printer (192)

light pen (182)

liquid crystal display (LCD) (190)

Magnetic-ink character recognition (MICR) (183)

mark recognition device (183)

mark sensing (183)

mechanical mouse (180)

memory (printer) (191)

Musical Interface Digital Interface MIDI (188)

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Key Terms

MIDI device (188)

monitor (189)

mouse (180)

mouse pad (180)

mouse pointer (180)

multifunction device (MFD) (194)

network computer (195)

network terminal (195)

numeric keypad (178)

optical character recognition (OCR) (183)

Optical-mark recognition (OMR) (183)

optical mouse (180)

optical scanner (182)

output (188)

output device (188)

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Key Terms

passive-matrix monitor (190)

PC/TV (190)

personal laser printer (192)

photo printer (192)

pixel (picture element) (189)

platform scanner (183)

plotter (192)

pointing (180)

pointing device (180)

pointing stick (180)

portable scanner (183)

printer (191)

reader/sorter (183)

refresh rate (189)

resolution (monitor)(189)

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Key Terms

resolution (printer) (191)

roller ball (180)

scanner (182)

scanning device (182)

screen (189)

server (195)

shared laser printer (192)

size (viewable size) (189)

soft copy (189)

speakers (193)

speed (printer) (191)

telephony (194)

terminal (195)

thermal printer (192)

thin client (195)

thin film resistor monitor (TFT) (190)

toggle key (179)

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Key Terms

touch pad (180)

touch screen (181)

touch surface (180)

trackball (180)

Universal Product Code (UPC) (183)

voice recognition system (185)

voice-over IP (VoIP) (194)

wand reader (183)

Web appliance (195)

WebCam (184)

Web camera (184)

Web terminal (195)

wireless mouse (180)

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FAQs

What are pointing devices?

I would like to insert several images in a document. How can I capture the images?

What are digitizing devices?

What is voice recognition?

What is the difference between a CRT and an LCD display?

What is HDTV?

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Discussion Questions

Describe the three different mouse types designed for input.

How does Internet telephony work? Discuss.

Discuss the features of multifunctional devices.

Describe the features of a monitor that help to make images appear clearer on the screen.

What are MIDI devices and how are they used?