Xerox 4635 User Interface Reference page 156

GLOSSARY
binary digit (bit)
binary synchronous transmission
GLOSSARY-2
backup file File copied to a storage medium for safekeeping in case the
original is damaged or lost.
baud Measurement of data rate in bits per second. This term is used
to describe information flow between two devices. Unit of data
transmitting and receiving speed is roughly equal to a single bit
per second. Common baud rates are 110, 300, 1200, 2400,
4800, and 9600.
binary Numbering system based on 2 that uses only the symbols 0 and
1. Binary is used in computers and related devices since
information can be represented with electric pulses (0=off,
1=on). Most computer calculations are binary.
In the binary numbering system, either of the characters 0 or 1.
The "bit" is the base unit of information used by computers. It
can take the form of a magnetized spot, an electric pulse, or a
positive or negative charge. A sequentially stored set of bits
represents a character on a computer.
Multipliers are:
1 or 0 byte = 8 bits
1 kilobyte (KB) or 1,024 bytes = 8,192 bits
1 megabyte (MB) or 1,048,576 bytes = 8,388,608 bits.
Computer space equivalents are:
1.5 KB = about 1 single-spaced typed page
30 KB = about 20 typed pages
150 KB = about 100 typed pages
Data transmission in which synchronization of characters is
controlled by timing signals generated at the sending and
receiving stations.
bit map Visual representation of graphic images in which a bit defines a
picture element (pixel); for example, if a bit is 1, the
corresponding pixel is printed.
bit mapped Display image generated bit by bit for each point or dot. A
software-driven scanner is used to create characters or graphics.
blocking Process of combining two or more records into a single block of
data which can then be moved, operated upon, or stored, as a
single unit by the computer.
block length Number of characters or bytes contained in a block of data (the
block is treated as a unit within the computer). Block length is
usually invariable within a system and may be specified in units
such as records, words, computer words, or characters.
XEROX 4635 LASER PRINTING SYSTEM PC USER INTERFACE REFERENCE