ORVYL and WYLBUR are the names associated with the Stanford Timesharing System. Initially developed in 1967-68 for the IBM S/360-67 mainframe computer, it was one of the first time-sharing systems to be made available for IBM computers.

The names ORVYL and WYLBUR are often used interchangeably, but:

Item Type Date
WYLBUR Fundamentals Manual  Dec 1980 

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