IBM 5150 Hardware Reference Manual page 361

12. Binary: (1) Pertaining to a selection, choice, or condition that
that has two possible values or states. (2) Pertaining to a fixed
radix numeration system having a radix of two.
13. BIOS: Basic Input/Output System.
14. Bootstrap: A technique or device designed to bring itself into a
desired state by means of it's own action, e.g. a machine routine
whose first few instructions are sufficient to bring the rest of
itself into the computer from an input device.
15. Buffer: An area of storage that is temporarily reserved for use in
performing an input/output operation, into which data is read or
from which data is written. Synonymous with I/O area. A
portion of storage for temporarily holding input or output data.
16. Bus: One or more conductors used for transmitting signals or
power.
17. Byte: (1) A binary character operated upon as a unit and
usually shorter than a computer word. (2) The representation of
a character.
18. CLK: Clock. (Refer to System Board I/O Channel
Descriptions).
19. Code: (1) A set of unambiguous rules specifying the manner in
which data may be represented in a discrete form. Synonymous
with coding scheme. (2) A set of items such as abbreviations
representing the members of another set. (3) Loosely, one
or more computer programs, or part of a computer program.
(4) To represent data or a computer program in a symbolic form
that can be accepted by a data processor.
20. Computer: A data processor that can perform substantial
computation, including numerous arithmetic operations, or
logic operations, without intervention by a human operator
during the run.
21. CPS: Characters per second.
22. CRC: The cyclic redundancy check character.
23. CRT: (1) A Cathode ray tube display. (2) A display device,
such as the IBM Monochrome Display, that uses a cathode ray
tube.
24. CTS: Conversational Terminal System. (2) Clear to Send.
Associated with modem control.
25. DACKO-DACK3: DMA Acknowledge 0 to 3. (Refer to
System Board I/O Channel Description).
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