Reading Review: 12/23/09

List five input devices and three output devices that might be attached to a PC.
Describe a typical use for each.

INPUT DEVICES:
Keyboard: Used for inputing information into the computer through typing. Such as typing a repot using a word processor.
Mouse: Used to send commands to the computer, such as clicking on the link to a website
Scanner: Used to input pictures and text into computers.
White smartboard: Used in schools and otehr places for presentaitons to store tha images on the board in the computer.

OUTPUT DEVICES
Moniter: Allows the computer to display information and any work being done by the computer on the screen
Speakers: Allows one to hear the content in the computer such as videos, music, etc
Pritner: Allows one to print information displayed on the screen form the ocmputer onto paper.


Name and describe three special-purpose input devices people commonly use in public places, such as stores, banks, and libraries.

Touch Screens: USed in restaurants and stores to input information regardign a purchase tinto a computer during checkout.
Optical mark Readers: Used by test amking companies to score standardized tests by scanning pencil marks.
Bar code Readers: Allow stores to gather information on a product by scanning its barcode

Many people find that the mouse is impractical for use as a pointing device on a laptop computer. Describe at least three alternatives that are more appropriate.

There are many alternatives for a mouse:
Touchpad: commonly found on laptops; uses a small panel sensitive to touch to navigate the computer screen.
Trackball: Uses a protruding ball to control the pointer on the screen.
Pointing stick: A small joysttick on the keyboard that can be used to control the pointer by pushing it in the direction you wish teh cursor to move.