1. Computers Are Your Future Twelfth Edition*
Computers Are Your Future Twelfth Edition
07/16/96
Chapter 2: Input and Output
Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

2. Input and Output *
07/16/96
Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

3. *
Objectives
07/16/96
Explain the various types of keyboards and the purpose of the special keys on the keyboard, identify the commonly used pointing devices, and list alternative input devices.
List the types of monitors and the characteristics that determine a monitor’s quality.
Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

4. *
Objectives
07/16/96
Identify the two major types of printers and indicate the advantages and disadvantages of each.
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5. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Input
Data or instructions entered into a computer
Input device
Hardware that gives users the ability to enter data and instructions into the computer’s random access memory (RAM)
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6. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Input device (con’t.)
Keyboard
Most common input device—enables data and instruction entry through the use of a variety of keys
Enhanced keyboards—additional keys, such as media control buttons to adjust speaker volume, or Internet control buttons that open , a browser, or a search window with a single keystroke
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7. Input Devices: Giving Commands*
07/16/96
Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall *

8. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Key matrix
Grid of circuits located under the keys
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9. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

10. The blue lines are the columns and
the red lines the rows. There are 16 knots
that the rows and columns intersect.
The columns and the rows are NOT in contact!
Suppose that we want to make a key matrix.
To do this, we will have to connect a button
to each knot. The buttons will have
a push-to-make contact.
When the operator pushes this button,
it will connect the column and the row that it
corresponds to
. Now i will put the push-to-make buttons
onto the matrix
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11. Character map Chart that tells the processor what key has been pressed
Character maps are programs with on-screen layout of symbols. You can use them to type all possible text symbols, and useful special characters, like letters foreign languages, or maths signs. For example, on the image to your right you can see what Mac's Character Palette looks like. Character maps are the best utilities for typing symbols you can find, and if you use Windows, or Mac then you already have them for sure.
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12. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Insertion point
Blinking vertical line, underscore, or highlighted box
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13. Wireless keyboards
Connect to the computer through infrared (IR), radio frequency (RF), or Bluetooth connections
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14. Universal Serial Bus (USB) connector
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15. PS/2 cable Often referred to as the mouse port or
keyboard port, the PS/2 port was
developed by IBM and is used to connect
a computer mouse or keyboard to an
IBM compatible computer.
Mouse is green, keyboard is purple.
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16. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Keyboards
Connect with:
Infrared
Radio frequency
Bluetooth
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17. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Special keyboard keys include:
Cursor movement keys (arrow keys)—set of four keys that move the cursor up, down, right, or left
Toggle keys—either on or off
Function keys—perform specific actions depending on the program
Modifier keys—used for shortcuts
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18. Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

19. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Alternate keyboards
Virtual (soft keyboard or on-screen keyboard)—a touch-sensitive screen; accepts input with a stylus or finger
Smartphone
Mini-keyboard—keys for each letter of the alphabet; option on many smartphones
Keypad—smaller, more compact, has keys that represent multiple letters
Virtual laser—used with devices as smartphones, an alternate way to do , word processing, spreadsheets
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20. Ex. Virtual Keyboard Ex. Mini Keyboard
Ex. Keypad A keypad is a set of buttons arranged in a block or "pad“
which bear digits, symbols or alphabetical letters.
Pads mostly containing numbers are called a numeric keypad. 
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21. Virtual Laser Keyboard
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22. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Alternate keyboards (con’t.)
Flexible keyboards—full-sized, lightweight portable devices
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23. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Pointing device
Controls an on-screen pointer’s movements
Pointer
On-screen symbol that signifies the command, input, or possible response
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24. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Mouse Types
Optical—most popular pointing device
Travel—all the capabilities of a normal mouse, half the size
Wheel—has a wheel for easy vertical scrolling
Wireless—connects through an infrared or radio signal (RF). Battery operated
Air—does not need to work on a surface, works as it moves through the air
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25. Travel Mouse Optical Mouse
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26. Wireless
Wheel
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27. Air Mouse
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28. Input Devices: Giving Commands*
Input Devices: Giving Commands
07/16/96
Mouse alternatives
Trackball
Pointing stick
Touchpad (also called a trackpad)
Click wheel
Gaming Controllers
Stylus
Touch screen
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29. Pointing Stick TRACKBALL
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30. Stylus
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31. Trackball
Is a pointing device that contains a movable ball held in a cradle. The user rolls the ball to move a pointer
From one to three keys can be located in various positions to perform equivalent mouse actions like a click
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32. Pointing Stick
A pointing device that looks like a pencil eraser between the G,H and B keys
Pressure sensitive and is pressed and moved in various directions with the forefinger
Copyright © 2012 Pearson Education, Inc. Publishing as Prentice Hall

33. Touch pads (trackpads)
A small, pressure sensitive, flat surface located on the notebook
Controls pointer by moving and tapping your fingers on the surface of the pad
Mouse (key term) controls a mouse pointer (key term) that appears in the shape of an arrow
Some mice have a wheel button (key term) for scrolling. The Optical Mouse (key term) is the most widely used
Mouse types
Optical mouse (Key Term) – has no moving parts
Emits and senses light to detect mouse movement
Can be used on any surface
Cordless mouse (Key Term) or wireless mouse (Key Term) – battery powered
Uses radio waves or infrared light waves
Touch pads (key term) –controls the pointer by moving and tapping your fingers on the surface of a pad

34. Click Wheel
A pad that looks like a circle that is used to move through song lists, movie lists or photos
Method of navigation on the iPod
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35. Gaming Controllers Provide input to computer games
Joysticks use pressure and direction of the stick
Gaming mice are similar to a mouse but high precision (sensitivity)
Game pads use both hands
Motion sensing device control games by user movement
Joystick (key term)– control game actions by varying pressure, speed and direction
Gaming Mouse – similar to traditional mice with higher precision, faster responsiveness, programmable buttons, and better ergonomics
Game pads (key term) – held by two hands
Motion sensing device (key term) – control games by user movement

36. Touch Screen
A display screen that is sensitive to the touch of a finger or stylus
Stylus is a pen-like device
Used on tablets
Uses handwriting recognition software
Common on mobile devices
Smart Mobiles
ATM machines
Airport kiosks
Desktop monitors
Multitouch screen (key term) – can be touched with more than one finger, which allows for interactions such as rotating graphical objects on the screen with your hand or zooming in and out by pinching and stretching your fingers. These screens are common on mobile devices such as the Apple iPhone, and some notebook computers and desktop monitors.
Stylus works using handwriting recognition software. It is a pen-like device.