Appendix C
| communicate properly, a printer must be configured |
| to operate at the same baud rate as its host |
| computer. |
bit | Contraction of binary digit. A bit is 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. |
bold | A print attribute specifying text of a heavy line |
| thickness. See also character weight. |
The | |
| operating system to be loaded into main memory. |
buffer | A reserved area in memory that data is written to and |
| read from during data transfers. |
bus | A circuit for the transfer of data or electrical signals |
| between two devices. |
byte | 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 |
character cell | 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 in the current line spacing, and the |
| width is equal to the current character spacing. Used |
| as a unit of spacing. |
character proportion | The ratio of character height to character width. See |
| also compressed and expanded. |
character set | 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. |
character weight | The degree of lightness and thickness of printed text. |
| For example: “Bold” refers to a heavy or thick |
| character weight, as shown in this sentence. |
| “Medium,” “normal,” or “book weight” refer to the |
| character weight used in this sentence. |
checksum | A value used to verify microcode correctness. |
coax | Coaxial cable. An electrical signal conductor |
| consisting of a single wire surrounded by insulation |
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