IBM AT 5170 Technical Reference page 483

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 transfoffil 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.
typematic key. A keyboard key that repeats its function when
I~
held pressed.
v.
Volt.
vector. In computer graphics, a directed line segment.
video. Computer data or graphics displayed on a cathode ray
tube, monitor, or display.
view point. In computer graphics, the origin from which angles
and scales are used to map virtual space into display space.
viewing reference point. In computer graphics, a point in the
modeling coordinate space that is a defined distance from the
view point.
viewing transformation. Operations on the coordinates of an
object (usually matrix multiplications) that cause the view of the
object to be rotated about any axis, translated (moved without
Glossary-37