1ab input and output
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CIS 105
Input and Output: The User Connection
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Describe the user relationship with computer input and output
Explain how data is input into a computer system and differentiate among various input equipment
Describe how a monitor works and the characteristics that determine quality
List and describe the different methods of computer output Differentiate among different kinds of printers Explain the function of a computer terminal and describe
the types of terminals Describe the ethical considerations involved in handling
computer data
Objectives
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What is Input? Software (Programs) Data User Responses Commands
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•Keyboard•Mouse•Trackball•Touchpad•Joystick•Pens•Pointing Stick•Touch Screen•Graphics Tablet
•Scanners•Optical Readers•OCR/OMR/Bar Code/ Magnetic Ink Character Reader•Data Collection Devices•Biological Feedback
ADA:•Keyguard•Head mounted pointer
•Digital Cameras•Microphone•Voice/Speech Recognition•Video Input•Videoconferencing
Input Devices
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Computer Keyboard Using a Computer Keyboard
Cursor-Movement Keys Numeric Keypad Toggle Keys Function Keys Modifier Keys Windows Keys
Alternative Keyboards Entering International Characters
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Face Recognition Technology
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How do scanners “read”? Keyboard types?
What are 4 types of Input?
Light Sensors
Data; program; commands;
user responses
QWERTY; Dvorak;Enhanced;
Wireless
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What is Output?
Text Characters
Graphics Digital
representation of nontext
• drawings• charts• photos
Image Editing Software
Audio Music, speech, sound
Video Images at speed
provide appearance of full motion
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Output Devices
•Monitors•Flat Panel• LCD Displays•Gas Plasma•HDTV (digital)
•Pixels•Resolution•Dot Pitch•Refresh Rate•Hertz
•Printers• Portrait/Landscape•Impact•Inkjet•Laser•Thermal printer•Portable printer•Braille printer•Plotters•Label printer•Fax machine•Multifunction
•HDTV•Speakers•Headsets•Tactile Displays
•Data Projectors• LCD• Digital Light (DLP)
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Video Card Display
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Resolution
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Choosing a Computer: Where Do You Start? Anticipate your
software needs first Check the system
requirements
Hardware CPU Monitor (screen
size, readability) Input Devices Secondary storage
space Portability Surge Protectors
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What is my budget? What are my needs? Can I expand the capabilities? Whom do I call if I have a problem
putting the machine together? Does the store offer classes on
hardware/software? What kind of warranty/
maintenance agreement comes with it? What’s available?
Who does the maintenance?
More Info? PC Purchase Worksheet
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Choosing a Printer…
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What is animation?
What are 4 types of Output?
Text; Graphics; Audio; Video
Series of still images displayed in rapid
sequence
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Ethics and Data Once data is in computer, there
are many ways it can be used Ethical issues to ponder
Is it ethical to use a computer to alter photographs?
Is it ethical to erase e-mail messages that may be of interest to a party in a lawsuit?
Is it ethical to use someone else’s data for your purposes?
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Terms to Know: Input/Output
Biological feedback devices CAD/CAM/CIM Cursor Data projector Dot pitch Input Input devices Keyboard shortcuts LCD
MIDI Non-interlaced monitors OCR Output Output devices QWERTY Pixel POS Speech recognition
Touchpad Trackball UPC Voice input Video Graphics Virtual reality
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Questions?
?
? ??
?
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If asked, can you explain…
Explain how data is input into a computer system and differentiate among various input equipment
Describe how a monitor works and the characteristics that determine quality
List and describe the different methods of computer output
Differentiate among different kinds of printers
Explain the function of a computer terminal and describe the types of terminals
Describe the ethical considerations involved in handling computer data
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Sources Capron; Computers: Tools for An
Information Age, 8th Ed. 2003 Pfaffenberger; Computers in Your
Future 2003 Microsoft Clipart