Computers Storage and Input/Output Devices Input and Output Devices Input device – converts our commands and data into a form a computer can understand Output device – converts computer data into a form humans can understand © 2005 Prentice-Hall, Inc.Slide 27

Computers Storage and Input/Output Devices The Keyboard Traditional alphanumeric keyboard QWERTY Special-function keyboard Fast-food cash registers © 2005 Prentice-Hall, Inc.Slide 28

Computers Storage and Input/Output Devices The Mouse Used in a GUI (Graphical User Interface) Point and select (click) Mouse pointer – cursor © 2005 Prentice-Hall, Inc.Slide 29

Computers Storage and Input/Output Devices Other Pointing Devices Trackpad Used mostly on notebook computers Move your finger over the touch-sensitive pad Trackpoint – similar to a miniature joystick Trackball – similar to an upside-down mouse © 2005 Prentice-Hall, Inc.Slide 30

Computers Storage and Input/Output Devices Other Pointing Devices Joystick – vertical stick used to move the pointer Digitizer tablet and pen – allow for the digitizing of images © 2005 Prentice-Hall, Inc.Slide 31

Computers Storage and Input/Output Devices Scanners Scanners convert printed matter into a format that can be stored in a computer © 2005 Prentice-Hall, Inc.Slide 32

Computers Storage and Input/Output Devices Scanners for Source Data Automation Handheld label scanner or wand scanner Stationary label scanner Document scanner Turnaround document © 2005 Prentice-Hall, Inc.Slide 33

Computers Storage and Input/Output Devices Bar Code UPC – Universal Product Code © 2005 Prentice-Hall, Inc.Slide 34

Computers Storage and Input/Output Devices OCR Technology OCR (optical character recognition) – scans characters into a computer MICR (magnetic-ink character recognition) – used in banking industry OMR (optical mark recognition) – used to grade tests or questionnaires © 2005 Prentice-Hall, Inc.Slide 35

Computers Storage and Input/Output Devices Image Scanners Image scanner – capable of translating text or images into a form a computer can read Image processing – manipulating scanned images © 2005 Prentice-Hall, Inc.Slide 36

Computers Storage and Input/Output Devices Page and Hand Image Scanners Page image scanner – works like a copy machine Hand image scanner – manually rolled over the image to be scanned © 2005 Prentice-Hall, Inc.Slide 37

Computers Storage and Input/Output Devices Magnetic Stripes Magnetic stripes like the ones on credit cards Badge reader – device to read an employee’s badge to determine clearance © 2005 Prentice-Hall, Inc.Slide 38

Computers Storage and Input/Output Devices Smart Card Can store information or money © 2005 Prentice-Hall, Inc.Slide 39

Computers Storage and Input/Output Devices Speech Recognition Speaker-dependent – can interpret spoken words from only one person Speaker-independent – will accept words from anyone, but has a limited vocabulary © 2005 Prentice-Hall, Inc.Slide 40

Computers Storage and Input/Output Devices Digicams Digital camera – records images digitally Digital video camera – captures motion video Webcams – digital video cameras connected to the Internet © 2005 Prentice-Hall, Inc.Slide 41

Computers Storage and Input/Output Devices Digicams Digital camcorder – captures video digitally Video capture card – expansion card that allows for the capture of video to disk © 2005 Prentice-Hall, Inc.Slide 42

Computers Storage and Input/Output Devices Handheld and Wearable Data Entry Devices Limited keyboard Small touch-sensitive display Storage capability – probably solid- state Scanning device capable of OCR © 2005 Prentice-Hall, Inc.Slide 43