Lesson 2 Input, Output, and Processing Computer Literacy BASICS: A Comprehensive Guide to IC 3, 4 th Edition.

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Presentation transcript:

Lesson 2 Input, Output, and Processing Computer Literacy BASICS: A Comprehensive Guide to IC 3, 4 th Edition

Objectives Identify and describe standard and specialized input devices. Identify and describe standard and specialized output devices. Connect input and output devices to a computer. Consider computer performance factors.

Vocabulary audio input biometrics digital camera expansion slot FireWire inkjet printer input keyboard laser printer modem monitor mouse output plug and play

Vocabulary (continued) pointing device port printer scanner trackball Universal Serial Bus (USB)

Standard Input Devices A modem is a device that allows one computer to talk to another. Keyboards: The keyboard is the most commonly used input device for entering text and numbers into a computer.

Standard Input Devices (continued) Keyboards (continued): – Ergonomic – Cordless/wireless – Specialized – Security – Foldable/flexible – Laser/virtual

Standard Input Devices (continued) Pointing Devices: A pointing device is an input device you use to position the pointer on the screen. The most common pointing device for personal computers is the mouse. – Mechanical – Optomechanical – Optical – Wireless – Trackball mouse – Radio frequency – Foldable mouse

Standard Input Devices (continued) Pointing Devices (continued): The trackball works like a mouse turned upside down; the ball is on top of the device. A common feature on laptop computers is the touchpad, with a specialized surface that can convert the motion and position of your fingers to a relative position on screen.

Standard Input Devices (continued) Pointing Devices (continued): Some notebook computers contain a pointing stick, a pressure-sensitive device that looks like a pencil eraser and is located on the keyboard, generally between the G, H, and B keys. Audio input is sound entered into a computer.

Standard Output Devices Output is data processed into a useful format. Monitors: Desktop computers typically use a monitor as their display device, including CRT, LCD, and gas plasma.

Standard Output Devices (continued) Printers: Printers produce a paper copy, or hard copy, of processing results. A laser printer produces high-quality output. An inkjet printer provides good-quality color printing for less expense. Speakers: Speakers and headsets generate sound.