What Is Input?

Discovering Computers Fundamentals,

2011 EditionLiving in a Digital World

Discovering Computers Fundamentals, 2011 Edition Chapter 5

2

What Is Input?

• Input is any data and instructions entered into the memory of a computer

Pages 188– 189 Figure 5-1


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What Is Input?

An input device is any hardware component that allows users to enter data and

instructions into a computer

Page 188


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Keyboard and Pointing Devices

A pointing device is an input device that allows

a user to control a pointer on the screen

A pointer is a small symbol on the screen whose location and

shape change as a user moves a pointing device

Page 189


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

Page 190 Figure 5-2


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• A mouse is a pointing device that fits under the palm of your hand comfortably– Most widely used pointing device on desktop

computers• A mouse can be wired or wireless

Pages 191 – 192Figure 5-4


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Touch Screens and Touch-Sensitive Pads

• A touch screen is a touch-sensitive display device

Page 193Figure 5-8

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Multi-Touch Screensbelow Chapter 5

http://www.scsite.com/dcf2011cp/ch5/weblink/



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Pen Input

• With pen input, you touch a stylus or digital pen on a flat surface to write, draw, or make selections

Page 194 Figure 5-11


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Other Types of Input

• Video games and computer games use a game controller as the input device that directs movements and actions of on-screen objects

Pages 196 - 197

Gamepads Joysticks and Wheels Light guns Dance pads

Motion-sensing

controllersWii Remote

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Game Controllersbelow Chapter 5




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• A digital camera is a mobile device that allows users to take pictures and store them digitally

Page 197

Studio cameras

Field cameras

Point-and-shoot camera


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• A Web cam is a type of digital video camera that enables a user to:

Page 199

Capture video and still images

Send e-mail messages with

video attachments

Add live images to instant messages

Broadcast live images over the

Internet

Make video telephone calls


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• A flatbed scanner creates a file of the document in memory– Works in a manner similar to a copy machine


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• Optical character recognition (OCR) involves reading characters from ordinary documents

• A turnaround document is a document you return to the company that creates and sends it

Page 200Figure 5-19


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• Optical mark recognition (OMR) reads hand-drawn marks such as small circles or rectangles

Page 200


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



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• Magnetic stripe card readers read the magnetic stripe on the back of cards such as:

Pages 201 Figure 5-22

Credit cards

Entertainment cards

Bank cards

Other similar cards


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• MICR (magnetic ink character recognition) devices read text printed with magnetized ink

• An MICR reader converts MICR characters into a form the computer can process

• Banking industry uses MICR for check processing



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• Biometrics authenticates a person’s identity by verifying a personal characteristic

Pages 202 - 203

Fingerprint reader

Face recognition

system

Hand geometry

system

Voice verification

system

Signature verification

system

Iris recognition

system

Retinal scanners


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What Is Output?

• Output is data that has been processed into a useful form

Pages 206 – 207 Figure 5-29


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What Is Output?

• An output device is any type of hardware component that conveys information to one or more people

Page 206

Display devices Printers

Speakers, headphones, and earbuds

Data projectors

Interactive whiteboards


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Display Devices

• A display device visually conveys text, graphics, and video information

• A monitor is packaged as a separate peripheral– LCD monitor– Widescreen

Pages 207 – 208Figure 5-30

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Widescreen LCD Monitors below Chapter 5




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Printers

• A printer produces text and graphics on a physical medium

• Before purchasing a printer, ask yourself a series of questions



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Printers

• An ink-jet printer forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper– Color or black-and-white– Printers with a higher dpi (dots per inch) produce a higher

quality output



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Printers

Laser printer

High-speed

High-quality

Color

Black-and-

white

Pages 214 – 215 Figure 5-38

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Laser Printers below Chapter 5




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Printers

• Plotters are used to produce high-quality drawings

• Large-format printers create photo-realistic quality color prints on a larger scale



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Printers

• Impact printers form characters and graphics on a piece of paper by striking a mechanism against an inked ribbon that physically contacts the paper

Page 217

Dot-matrix printer

Line printer


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Other Output Devices

• An audio output device produces music, speech, or other sounds


Most computer users attach speakers to their computers to:• Generate higher-quality sounds for playing

games• Interact with multimedia presentations• Listen to music• View movies


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• Headphones are speakers that cover or are placed outside of the ear

• Earbuds (also called earphones) rest inside the ear canal

Page 218

Click to view Web Link,click Chapter 5, Click Web Link from left navigation, then click Earbudsbelow Chapter 5




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• A data projector is a device that takes the text and images displaying on a computer screen and projects them on a larger screen


Discovering Computers Fundamentals,

2011 EditionLiving in a Digital World

Chapter 5 Complete

Documents

What Is Input?