3.3 Input Devices
Input is the
entering of data into the computer for processing into information.
1. Keyboard is an input device consisting
of a row of keys in a standard layout. The QWERTY keyboard is the most common.
2. Pointing Devices are mouses,
trackballs, joysticks, light pens and touch screens.
3. Character readers 'see' text and are
bar-code wands, bar code scanners, document readers, optical character readers
and scanners.
True or
False? Write out the true sentences and change the false sentences so that they
are true.
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Input is the entering of data into the computer for processing into information. |
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The QWERTY keyboard is named after the first six letters of the third row. |
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The QWERTY keyboard was developed and patented in 1967 by Christopher Sholes. |
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A mouse is an input device consisting of series of keys in a standard layout. |
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A button on the mouse allows a character or command to be selected from the screen. |
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The mouse is frequently used in computer aided design because its movement is far more precise than that of a trackball. |
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A graphics tablet is an input device that consists of a special electronic pad and a pen called a stylus. |
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Light pens enter data be detecting the touch of your finger. |
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Bar-code scanners are used in the supermarket and are set into the surface of the checkout counters. |
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A document reader is an input device that is able to read text from specific areas of a form. |