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Glossary
firmware: Software permanently stored in read-only memory in the CPU
or in a device controller. You can update the information by
replacing the ROM or reprogramming flash ROM.
flash ROM: A type of non-volatile memory that you can reprogram with
software supplied by the device manufacturer. It allows you to
upgrade the server or controllers without replacing the ROM.
folder (also called directory): Part of the organizational structure that
allows the operating system to locate files (documents). Each folder
holds a number of related files and folders (subdirectories).
font: A complete set of characters of one design and size, used to display
information on the screen or output it to a printer.
format: To prepare a blank disk for use with the computer's operating
system. Formatting creates a structure on the disk so that the
operating system can write information to the disk or read
information from the disk.
frame: An individual picture in film and video. Film has 24 frames per
second (fps). Video has 30 fps. With the SMPTE time code, each
video frame has a unique address. On a videodisc, a frame is a block
of coherent information (a picture, block of text, etc.). A videodisc
contains 54,000 frames, each with a unique address.
full duplex: A type of data transmission in which data flows between two
devices in both directions simultaneously. See also half duplex.
full-motion video: (1) Video sequences or systems that provide the
number of images per second to result in the illusion of smooth
motion. (2) The rate of standard video signals in the U.S. (30 frames
per second) and in Europe (25 frames per second).
function keys: The keys labeled F1 through F12. They are located above
the alphanumeric keys on the keyboard. Their function is
determined by the operating system and/or individual programs.
G
gigabyte (GB): A unit of data storage equal to 1,073,741,824 bytes (1024
x 1024 x 1024 bytes). See also byte.
graphics: Information presented as drawings, pictures, or other images,
such as charts or graphs.
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