Exrcise in Chapter 5

I.   True/False

1. True
2. True
3. False
4. True
5. True
6. False
7. False
8. False
9. False
10. True
11. True
12. True

II.   Multiple Choices

1. C. Ergonomic keyboard
2. A. Predictive text input
3. B. Multi-touch
4. C. Graphics tablet
5. D. Voice recognition
6. C. Music production software
7. C. Radio signals
8. C. Gesture recognition

III.   Matching

1. b
2. g
3. d
4. j
5. e
6. a
7. h
8. f
9. i
10. c

IV.   Short  Answer

1.  Three different type of mouse devices:

• Optical mouse
• Laser mouse
• Air mouse

What  makes them different:

• Optical mouse uses devices that emit and sense light to detect the mouse’s movement. Some use optical sensors and others use a laser.
• Laser mouse enables users to place the mouse on rougher surfaces such as carpeting and park benches.
• Air mouse is a motion-sensing mouse that, in addition to the typical buttons, allows users to control objects, media players, and slide shows by moving the mouse in predetermined directions through the air.

2.   Five mouse operations:

• Point

Move the mouse until the pointer on the desktop is positioned  on the item of choices. Example: Position the pointer on the screen.

• Click

Press and release the primary mouse button, which usually is the left mouse button. Example: Select or deselect items on the screen or start a program or program feature.

• Drag

Point to an item, hold down the left mouse button, move the item to the desired location on the screen, and then release the left mouse button. Example:  Move an object from one location to another or draw pictures.

• Rotate Wheel

Roll the wheel forward or backward. Example: Scroll vertically (up and down).

• Press thum button

Press the button on the side of the mouse with your thumb. Example: Move forward or backward through Web pages and/or control media, games, etc.

3.   OCR  (optical character recognition) is a software which  can read and convert text documents into electronic files.

       OMR (optical mark recognition) is a technology that reads hand-drawn marks such as small circles or rectangles.

4.   The most widely used biometric device today is a fingerprint reader.

Fingerprint reader, or scanner, captures curves and indentations of a fingerprint. The reader can be set up to perform different functions for different fingers; for example, one finger starts a program and another finger shuts down the computer.

5.   Americans with Disabilities Act is

With gesture recognition, the computer will detect human motions. Computers with gesture recognition capability have the potential to recognize sign language, read lips, track facial movements, or follow eye gazes.

For paralyzed or speech impaired individuals, a doctor will implant a computerized device into the brain. This device will contain a transmitter. As the user thinks thoughts, the transmitter will send signals to the computer.