Synonym carrier noise level.

[In security, the] portion of risk remaining after security measures have been applied. [INFOSEC-99]

Data left in storage after information processing operations are complete, but before degaussing or overwriting has taken place. [INFOSEC-99]

A network of resistors to which four branches of a circuit may be connected to make them conjugate in pairs.
Note: The primary use of a resistance hybrid is to convert between 2-wire and 4-wire communications circuits. Such conversion is necessary when repeaters are introduced in a 2-wire circuit.

Synonym resolving power.

Computer software that allows user programs to interface with domain name servers.
Note: The user program may be, for example, an FTP client. [2382-pt.35]

A measure of the ability of a lens or optical system to form separate and distinct images of two objects with small angular separation.
Note 1: An optical system cannot form a perfect image of a point (i.e., point source). Instead, it performs what is essentially a Fourier transform, and the resolving power of an optical system may be expressed… (Read More →)

In an electrical circuit, the condition that exists when the inductive reactance and the capacitive reactance are of equal magnitude, causing electrical energy to oscillate between the magnetic field of the inductor and the electric field of the capacitor.
Note 1: Resonance occurs because the collapsing magnetic field of the inductor generates an electric current in its windings that charges… (Read More →)

Synonym periodic antenna.

See optical cavity.