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. ----------------------------------------------------------------- gopher://quux.org/ conversion by John Goerzen of http://communication.ucsd.edu/A-News/ This Usenet Oldnews Archive article may be copied and distributed freely, provided: 1. There is no money collected for the text(s) of the articles. 2. The following notice remains appended to each copy: The Usenet Oldnews Archive: Compilation Copyright (C) 1981, 1996 Bruce Jones, Henry Spencer, David Wiseman.