R interface

For a basic rate access in an ISDN environment, the interfacing specifications covering pre-ISDN standards (e.g., EIA-232C).

R/C

Abbreviation for radio control, radio service.

RA

1. Remote Access, 2. Radiocommunication Assemblies.

raceway

Within a building, an enclosure, i.e., channel, used to contain and protect wires, cables, or bus bars.

RACF

Resource and Admission Control Functions

rack

A frame upon which one or more units of equipment are mounted. Note: DOD racks are always vertical.

racon

See radar beacon.

RACS

Resource and Admission Control Subsystem

rad

Acronym for radiation absorbed dose. The basic unit of measure for expressing absorbed radiant energy per unit mass of material. Note 1: A rad corresponds to an absorption of 0.01 J/kg, i.e., 100 ergs/g. Note 2: The absorbed radiant energy heats, ionizes, and/or destroys the material upon which it is incident.

rad.

Abbreviation for radian(s).

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