Hi, Rene,
FYI, OS/360, OS/VS1, and OS/VS2 (SVS and MVS) also had "expiration date protection" of datasets available.? It was mainly used for tape datasets, but it could also be used for DASD resident datasets.? ?Back before RACF, this was one way to protect datasets from accidental deletion.? OS/360 up through MVS also had "password protection" but every shop I ever worked at avoided it like the plague.
Mark
