Return Data Channel

Abbreviation for radio direction-finding.

1. [A] fundamental operation in an information system (IS) that results only in the flow of information from an object to a subject. [INFOSEC-99]
2. A fundamental operation that results only in the flow of information from an object to a subject [POSIX.6].
3. A fundamental operation that results only in the flow of information from an object to a… (Read More →)

1. In computer or data processing technology, the privilege (or capability) of reading electronically the information in a file or data base, without the privilege (or capability) to modify it. Synonym read-only access.
2. [In INFOSEC,] permission to read information in an information system (IS). [INFOSEC-99]
3. Permission to read information [TCSEC].

A magnetic head capable of reading only.

See read access.

1. A memory in which data, under normal conditions, can only be read. Synonym nonerasable storage.2A storage area in which the contents can be read but not altered during normal computer processing [TCSEC].

A storage device in which the contents cannot be modified, except by a particular user, or when operating under particular conditions, e.g., a storage device in which writing is prevented by a lockout. Synonym fixed storage.

Synonym read/write slot.

An opening in the jacket of a diskette to allow access to the read/write heads. Synonym read/write opening.