International Symposium on Semantics of Data Types | September 1984
Also Digital SRC Research Report 1, September 1984. A later version appeared as "Pebble: A kernel language for modules and abstract data types" in Information and Computation 76, 2/3 (Feb./Mar. 1988), pp 278-346
9th ACM Symposium on Operating Systems Principles | October 1983
ACM SigOps Hall of Fame award 2005. A classic study of experience building large systems, distilled into a cookbook of wisdom for the operating systems researcher. As time has passed, the value of these hints has only grown and the range of systems to which they apply enlarged.
ACM Operating Systems Rev. 15, 5 (Oct. 1983). A slightly revised version was reprinted in IEEE Software 1, 1 (Jan. 1984), pp 11-28