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Aucbvax.2022 fa.works utzoo!duke!decvax!ucbvax!Deutsch@PARC-MAXC Wed Jul 1 04:02:10 1981 Re: Multiple Levels Of State Whoever mentioned the MIT Lisp machine solution hit the nail on the head: if (1) there is no notion of "nesting" of suspensions, but rather simply á pool of tasks in various stages of completion which the user ãan switch between at will, and (2) every partially complåted task is represeîted by a VISIBLE OBJECT on the screen, then there is no issue about forgetting partially completed tasks, being forced to complete them in the order they were started, etc., etc. I believe (at leasô I hope) the Star works this way, since all the experimental multi-window systems at PARC do.

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