List five input devices and three output devices that might be attached to a PC. Describe a typical use for each.
Input devices: Keyboard: Allows a user to type text and sends signals to the computer throogh a cable
Mouse: A mouse allows you to position the cursor on the mopnitor to perform commands
Scanner: A scanner allows you to scan a picture into the computer, and creates a digital picture of it
Smart Whiteboard: is a board full of information stored as a digital image on the computer's disk. Also available with handwriting recognition .
Joystick: A shift-like device that's a favorite controller for arcade-style games.
Output Devices: A monitor: Allows a user to view the computer, internet, documents
Printer: Prints documents and digital pictures
Speakers: Convert analog signal into sound
Projector: A projector converts the monitor image to create a large picture
Soundcard: enables the PC to accept microphone input, play music and other sound through speakers.
- Name and describe three special-purpose input devices people commonly use in public places, such as stores, banks, and libraries.
Drum Scanners: larger and more expensive than other scanners, used in publishing applications were image quality is critical
BArcode readers used in stores to read universal product codes (UPC's)
Optical mark readers: USed to capture the location of pencil marks on standardized tests.
Touch screen: responds to differnt touch recognition usually used in public liabraries airports, and shopping malls.
- 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.
Pointing stick: Or the Trackpoint, tiny handle in the center of the board that would respond to finger pressure
Stylus: performs point and click functions, usually on handheld devices
Touch screen: responds to when a user touches difernt screen recognition
Touchpad(trackpad) _ a small flat panel that's sensitive to light pressure.
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