Computers Storage and InputOutput Devices Input and Output

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

Computers Storage and Input/Output Devices The Keyboard üTraditional alphanumeric keyboard üQWERTY üSpecial-function keyboard üFast-food cash registers © 2005 Prentice-Hall, Inc. Slide 28

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

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

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

Computers Storage and Input/Output Devices Scanners ü 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 ü Handheld label scanner or wand scanner ü Stationary label scanner ü Document scanner üTurnaround document © 2005 Prentice-Hall, Inc. Slide 33

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

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

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

Computers Storage and Input/Output Devices Page and Hand Image Scanners ü Page image scanner – works like a copy machine ü 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 üMagnetic stripes like the ones on credit cards üBadge 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 üCan store information or money © 2005 Prentice-Hall, Inc. Slide 39

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

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

Computers Storage and Input/Output Devices Digicams üDigital camcorder – captures video digitally üVideo 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 üLimited keyboard üSmall touch-sensitive display üStorage capability – probably solidstate üScanning device capable of OCR © 2005 Prentice-Hall, Inc. Slide 43