RSTS/E

A multi-user, general purpose timesharing operating system produced by Mentec, Inc. and licensed bu Digital Equipment Corporation.

RSTS/E can be used for interactive timesharing, batch processing, indirect command file processing, program development using a variety of languages and tools, and a wide variety of special purpose applications. Up to 127 concurrent terminal users in both local and remote locations through multi-terminal services can interact with application tasks. Without multi-terminal services, 63 users are the maximum. Tasks can share computational, storage, and input/output services provided by the RSTS/E system.