Single Sign On

The invariability of a specified property of a substance, device, or apparatus with time, or under the influence of typically extrinsic factors.

In facsimile systems, periodic error in the position of the recorded spot along the recorded line.

1. Guideline documentation that reflects agreements on products, practices, or operations by nationally or internationally recognized industrial, professional, trade associations or governmental bodies.
Note: This concept applies to formal, approved standards, as contrasted to de facto standards and proprietary standards, which are exceptions to this concept.
2. An exact value, a physical entity, or an abstract concept, established and defined… (Read More →)

A radiocommunication service for scientific, technical and other purposes, providing the transmission of specified frequencies, time signals, or both, of stated high precision, intended for general reception. [NTIA] [RR]

A station in the standard frequency and time signal service. [NTIA] [RR]

A radiocommunication service using space stations on Earth satellites for the same purpose as those of the standard frequency and time signal service. This service may also include feeder links necessary for its operation. [NTIA] [RR]

See SGML.

The set of conditions (e.g., voltage, temperature, humidity, and the like) over which the specified parameters maintain their stated performance rating. [T1.106-1988]

A reference optical source to which emitting and detecting devices are compared for calibration purposes.
Note: In the United States, recognized standard optical sources must be traceable to the National Institute of Standards and Technology (NIST), formerly the National Bureau of Standards (NBS).