IBM AT 5170 Technical Reference page 479

row address strobe (RAS). A signal that latches the row address
in a memory chip.
RS-232C. A standard by the EIA for communication between
computers and external equipment.
RTS. Request to send. Associated with modem control.
rIDl.
A single continuous perfornlance of a computer program or
routine.
saturation. In computer graphics, the purity of a particular hue.
A color is said to be saturated when at least one primary color
(red, blue, or green) is completely absent.
scaling. In computer graphics, enlarging or reducing all or part
of a display image by multiplying the coordinates of the image by
a constant value .
.
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schematic. The representation, usually in a drawing or diagram
form, of a logical or physical structure.
Schottky TTL. A version (S series) of TTL with faster switching
speed, but requiring more power. See also transistor-transistor
logic and low power Schottky TTL.
SDLC. Synchronous Data Link Control.
sector. That part of a track or band on a magnetic drum, a
magnetic disk, or a disk pack that can be accessed by the
magnetic heads in the course of a predetermined rotational
displacement of the particular device.
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SERDES. Serializer / deserializer.
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