Table of Contents
Advertisement
Glossary
bit
bold
Boot-up
buffer
bus
byte
character cell
character proportionThe ratio of character height to character width.
character set
character weight
checksum
command
command delimiter An ASCII character used to begin a command string.
100
Contraction of binary digit. A digit in the binary number
system, represented by a 0 or a 1. A bit is the smallest
unit of storage in a digital computer, where 0 and 1 are
represented by different voltages. Groups of bits form
other units of storage called nibbles, bytes, and words.
A print attribute specifying text of a heavy line thickness.
See also character weight.
The start-up procedure which causes a computer
operating system to be loaded into main memory.
A reserved area in memory that data is written to and
read from during data transfers.
A circuit for the transfer of data or electrical signals
between two devices.
A group of consecutive bits forming a unit of storage in a
digital computer and used to represent one alphanumeric
character. A byte usually consists of 8 bits, but may
contain more or fewer bits, depending on the computer or
protocol.
C
The invisible rectangular space occupied by a character,
including the white space around the character. The
height of a cell remains constant even with changes to
the current line spacing, and the width is equal to the
current character spacing. Used as a unit of spacing.
See also compressed and expanded.
A set of codes, each of which represents a control or
printable character, including symbols, punctuation,
numbers, diacritical markings, and alphabet characters.
Each character is assigned a unique address in memory.
The degree of lightness and thickness of printed text. For
example: "Bold" refers to a heavy or thick character
weight. "Medium," "normal," or "book weight" refer to the
character weight used in this sentence.
A value used to verify microcode correctness.
An operating instruction (e.g., form feed, or FF) sent from
a computer to the printer. Also called a control code or
non-printable character. Commands are opposed to
data, which is printed.
Commonly used command delimiters are ESC (hex 1B)
and SOH (hex 01).
Advertisement
Table of Contents
