USL

1. Query language, close to natural English.

2. User System Language.

Bellcore, "Operations Technology Generic Requirements: User System Interface", TR-825.

3. Unix System Laboratories: the software subsidiary of AT&T, responsible for Unix System V and related software.

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user-obsequious user-unctuous Use the Source Luke USG Unix usim	ABEND Actors Advanced RISC Computing Specification Alternating bit protocol Amulet	USP USR usr US Robotics U.S. Robotics, Inc.