Chapter 5Input and Output

What Is Input?

What is input?

p. 166 Fig. 5-1 Next

Input device is any hardware component used to enter data or instructions into a computer

Data or instructions entered into the memory of computer

Keyboard and Pointing Devices

What are a touchpad and a pointing stick?

p. 170 Figs. 5-5—5-6 Next

Touchpad is small, flat, rectangular pointing device sensitive to pressure and motion

Pointing stick is pointing device shaped like pencil eraser positioned between keys on keyboard

Keyboard and Pointing Devices

What is a touch screen?

p. 171 Fig. 5-9 Next

Touch areas of screen with finger

Often used with kiosks

Keyboard and Pointing Devices

What is a stylus and a digital pen?

p. 172 Fig. 5-10 Next

Looks like a ballpoint pen, but uses pressure to write text and draw lines

Used with graphics tablets, flat electronic boards

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Pen Inputbelow Chapter 5

Other Input Devices

What is voice input? Entering data by speaking into a microphone Voice recognition or speech recognition is the

computer’s capability to distinguish spoken words

p. 173 Next

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Voice Inputbelow Chapter 5

Other Input Devices

p. 173 Fig. 5-13 Next

What is audio input? Entering sounds into a computer - speech,

music, and sound effects MIDI - (Musical Instrument Digital Interface) standard defining how digital musical

devices represent sound electronically

Other Input Devices

What is resolution?

p. 175 Next

Sharpness and clarity of image The higher the resolution, the better the image

quality, but the more expensive the camera Pixel (picture element) is single point in electronic

image Greater the number of pixels, the better the image

quality

Other Input Devices

What is a scanner?

p. 177 Fig. 5-19 Next

Light-sensing device that reads printed text and graphics Used for image processing, converting paper

documents into electronic images

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Scannersbelow Chapter 5

Other Input Devices

What is a magnetic stripe card reader?

p. 179 Fig. 5-23 Next

Reads the magnetic stripe on the back of a credit card

Exposure to a magnetic field can erase the contents of a card’s magnetic stripe

Other Input Devices

What is biometrics?

p. 181 Fig. 5-27 Next

Authenticates person’s identity by verifying a personal characteristic

Fingerprint scanner captures curves and indentations of fingerprint

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click Biometric Input below Chapter 5

Other Input Devices

What are examples of biometric technology?

p. 181 Fig. 5-28 Next

Voice verification system compares live speech with stored voice pattern

Signature verification system recognizes shape of signature

Iris recognition system reads patterns in blood vessels in back of eye Biometric data is sometimes stored

on smart card, which stores personal data on microprocessor embedded in card

What is Output?

What is output?

p. 182 Fig. 5-29 Next

Data that has been processed into a useful form,called information Output device is any hardware component that can convey

information to one or more people

Display Devices

What is an LCD monitor?

p. 184 Fig. 5-30 Next

Uses liquid crystal display Have a small footprint Mobile devices that contain

LCD displays include Notebook computer,

Tablet PC, PDA, and Smart Phone

Click to view Web Link,click Chapter 5, Click Web Linkfrom left navigation, then click LCD Technology below Chapter 5

Other Output Devices

What is voice output?

p. 194 Next

Computer talks to you through speakers on computer Internet telephony allows you to have conversation

over Web

Input and Output Devices for Physically Challenged Users

What input devices are available for those with physical limitations?

p. 197 Fig. 5-48 Next

Keyboards with larger keys Head-mounted pointer controls

pointer on screen

Input and Output Devices for Physically Challenged Users

What other output options are available for visually impaired users?

p. 197 Fig. 5-49 Next

Change Window settings, such as increasing size or changing color of text to make words easier to read

Blind users can work with voice output

Braille printer outputs information in Braille onto paper