The 1982 George Forsythe Memorial Lectures by Jerome H. Saltzer Stanford University Computer Science Department Lecture #2, Wednesday, January 27, 1982, at 7:30 p.m., in Jordan 040 Intended audience: Computer science audience with computer systems interest. Title: INTRIGUING IDEAS ABOUT COMPUTER SYSTEMS In the last few years. several interestingly powerful ways of thinking about computer systems have emerged, sometimes replacinq a long-standing but murky intuition. Four of these ideas will be discussed, with examples that illustrate why they seem to be especially intriguing and potentially important: a) hints: separating fundamental structure from speedup trickery. b) write-once: the log is really the data. c) end-to-end arguments: only the applications knows how. d) failure models separating algorithm from opinion.