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35 Cards in this Set
- Front
- Back
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Examples of relative pointing devices |
trackball mouse joystick |
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examples of absolute pointing devices |
touchscreen touch pad light pen |
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what is a relative pointer? |
a pointing device where relative motion is important, not location |
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what is an absolute pointer? |
location is important, but not relative motion |
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example of commercial devices |
bar code scanners magnetic strip readers |
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how to characterize a printer? |
how character is formed how character is transferred to paper what unit is printed what interface is used |
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how characters are formed with a printer |
fully formed dot matrix image |
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how characters are transferred to paper |
impact non-impact |
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what unit is printed |
character line page |
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what interface is used |
serial parallel |
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factors in choosing a printer |
purchase cost print speed print quality reliability flexibility compatibility |
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terminals |
has a display screen and a keyboard and can input and output data, but has trouble processing data |
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dumb terminal |
cannot process data |
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radio-frequency identification tags |
based on identifying tag bearing a microchip that contains specific code numbers |
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audio-input device |
records analog sound and translates it for digital storage and processing |
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sound board |
an add-on circuit board in a computer that converts analog sound to digital sound and stores it or plays it back |
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biometrics |
the science of analyzing and measuring specific biological characteristics of an individual to create a digital identifier (fingerprints, hand, eye, etc) |
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softcopy |
data that is shown on a display screen or is in audio or voice form: exists only electronically |
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dot pitch |
the amount of space between the centers of adjacent pixels; the closer the pixels, the crisper the image |
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color depth |
the amount of information, expressed in bits, that is stored in a dot |
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refresh rate |
the number of times per second that the pixels are recharged so that their glow remains bright |
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impact printer |
forms characters or images one at a time by striking a mechanism such as a print hammer, leaving an image on paper |
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nonimpact printer |
forms characters and images without direct physical contact |
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laser printers |
creates images with dots |
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inkjet printers |
spray onto paper small, electrically charged droplets of ink |
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thermal printers |
use a type of coated paper that darkens when heat is applied to it |
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multifunction printers |
print, scan, copy, and/or fax |
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plotter |
produces large, high-quality graphics in a variety of colors |
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convergence |
combination of several industries |
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serial printer |
stores up the eight bits that make up a byte then send them one at a time |
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advantage of serial printer |
simpler and less costly |
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disadvantage of serial printer |
slower |
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parallel printer |
sends all eight bits of the byte at the same time |
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advantage of parallel printer |
faster |
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disadvantage of parallel printer |
a wire is required for each bit making it more complicated and more costly |
