IBM AT 5170 Technical Reference page 484

rotating), and/or scaled (changed in size along any or all
dimensions). Viewing transformation differs from modeling
transformation in that perspective is considered. See also
modeling transformation.
viewplane. The visible plane of a CRT display screen that
completely contains a defined window.
viewport. In computer graphics, a predefined part of the CRT
display space.
volt. The basic practical unit of electric pressure. The potential
that causes electrons to flow through a circuit.
w.
Watt.
watt. The practical unit of electric power.
window.
(1)
A predefined part of the virtual space. (2) The
visible area of a viewplane.
word. (1) A character string or a bit string considered as an
entity. (2) See computer word.
write. To make a permanent or transient recording of data in a
storage device or on a data medium.
write precompensation. The varying of the timing of the head
current from the outer tracks to the inner tracks of the diskette to
keep a constant 'write' signal.
yon plane.
In computer graphics, a plane that is perpendicular to
the line joining the viewing reference point and the view point,
and that lies beyond the viewing reference point. Any part of an
object beyond the yon plane is not seen. See also hither plane.
Glossary-38