IBM 5170 Technical Reference page 436

interpretation and use. (2) The structure of expressions in a
language. (3) The rules governing the structure of a language.
(4) The relationships among symbols.
text. In ASCII and data communication, a sequence of characters
treated as an entity if preceded and terminated by one STX and
r "
one ETX transmission control character, respectively.
time-out.
(1) A parameter related to an enforced event designed
to occur at the conclusion of a predetermined elapsed time. A
time-out condition can be cancelled by the receipt of an
appropriate time-out cancellation signal. (2) A time interval
allotted for certain operations to occur; for example, response to
polling or addressing before system operation is interrupted and
must be restarted.
track.
(1) The path or one of the set of paths, parallel to the
reference edge on a data medium, associated with a single reading
or writing component as the data medium moves past the
component. (2) The portion of a moving data medium such as a
drum, or disk, that is accessible to a given reading head position.
transistor-transistor logic (TTL).
A popular logic circuit family
that uses multiple-emitter transistors.
translate.
To transform data from one language to another.
transmission.
(1) The sending of data from one place for
reception elsewhere. (2) In ASCII and data communication, a
series of characters including headings and text. (3) The
dispatching of a signal, message, or other form of intelligence by
wire, radio, telephone, or other means. (4) One or more blocks
or messages. For BSC and start-stop devices, a transmission is
terminated by an EOT character. (5) Synonymous with data
transmission.
TTL. Transistor-transistor logic.
V.
Volt.
Glossary-34