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Computer Concepts and Applications
N/A
37
Computer Networking
Undergraduate 1
09/28/2010

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Cards

Term
hardware
Definition
the parts you can actually touch
Term
system unit
Definition
the box that contains the central electronic components of the computer
Term
peripheral devices
Definition
devices such as monitor and printers that are connected to the computer
Term
input device
Definition
enables you to enter data (text, images,and sounds) and instructions (user responses and commands) into the computer
Term
keyboard and mouse
Definition
keyboards: to enter typed data and commamds
mouse: to enter user responses and commands
Term
QWERTY keyboard
Definition
regular (straight) keyboard
Term
Dvorak keyboard
Definition
a different set up for the keys for quicker typing (not as common as the QWERTY keyboard)
Term
numeric keypad
Definition
allows you to enter numbers quickly
Term
Function keys
Definition
act as shortcut keys you press to preform special tasks
Term
Control (Ctrl) key
Definition
is used in combination with other keys to preform shortcuts and special tasks
Term
Alt key
Definition
with other keys for additional shortcuts and special tasks
Term
Windows key
Definition
is specific to the Windows operating system. Used alone, it brings up the start menu; however, it's used most often in combination with other keys as shortcuts. For ex. pressing the Windows key plus the E key starts Windows Explorer
Term
gaming keyboard
Definition
is optimized for playing specific video games
Term
cursor control keys
Definition
moves your cursor
Term
cursor
Definition
the flashing I symbol on the monitor that indicates where the next character will be inserted
Term
toggle key
Definition
will change the function each time you press it (some keys have multi functions)
Term
trackball mouse
Definition
is basically a traditional mouse that has been turned on its back
Term
optical mouse
Definition
has instead of a roller-ball it uses an internal sensor or laser to detect the mouse's movement
Term
trackpoint device
Definition
a small, joystick-like nub that allows you you to move the cursor with the tip of your fingers
Term
touchpad
Definition
a touch sensitive screen at the base of the keyboard
Term
output device
Definition
enable you to send processed data out of your computer. (can be the form of text, pictures, sounds, and video)
Term
monitor sometimes called display screen
Definition
which displays text, graphics, and video
Term
printer
Definition
which creates tangible or hard copies (copies you can touch) of text and graphics
Term
cathode-ray tube (CRT)
Definition
old standard (big) monitor
Term
liquid crystal display (LCD)
Definition
flat monitor, such as found in notebooks (also flat-panel monitors)
Term
pixels
Definition
CRT monitors screens is a grid made up of millions of PIXELS (or tiny dots). Simply put, illuminated pixels are what create the images you see on your monitor. Pixel colors: red, green, and blue
Term
refresh rate
Definition
(sometimes referred to as vertical refresh rate) is the number of times per second the electron beam scans the monitor and recharges the illumination of each pixel.
Term
resolution
Definition
is controlled be the number of pixels displayed on the screen.the higher the resolution, thee sharper and clearer the image. A high end monitor may have a max. resolution of 1,600 x 1,200 meaning it contains 1,600 vertical columns with 1,200 pixels in each column.
Term
dot pitch
Definition
is the diagonal distance, measured in millimeters, between pixels of the same color on the screen. A smaller dot pitch means that there is less blank space between pixels and thus a sharper, clearer image.
Term
passive-matrix displays
Definition
less expensive LCD monitors use passive-matrix displays. This technology uses an electrical current passed through the liquid crystal solution to charge groups of pixels, either in a row or a column.
Term
active-matrix displays
Definition
more expensive monitor use active-matrix displays. Each is charged individually, as needed. The result is that an active matrix display produces a clearer, brighter image with better viewing angles.
Term
data projectors
Definition
are devices that are used to project images from your computer onto a wall or viewing screen
Term
impact printers
Definition
have tiny hammer like keys that strike the paper through an inked ribbon, thus making a mark on the paper. The most common impact printer is the dot-matrix printer.
Term
non-impact printers
Definition
don't have mechanisms that strike the paper. Instead, they spray ink or use laser beams to transfer marks onto the paper. the most common non-impact printers are ink jet printers.
Term
dot-matrix printers
Definition
the first computer printers
Term
inkjet printers
Definition
are quieter, faster, and offer higher-quality printouts.
Term
stand by mode
Definition
puts the monitor and computer in idle mode
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