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(SAIL) Dan Swinehart & Bob Sproull, Stanford AIProject, 1970. A large ALGOL 60-like language for the DEC-10and DEC-20. Its main feature is a symbolic data system basedupon an associative store (originally called LEAP). Items maybe stored as unordered sets or as associations (triples).Processes, events and interrupts, contexts, backtracking andrecord garbage collection. Block- structured macros. "RecentDevelopments in SAIL - An ALGOL-based Language for ArtificialIntelligence", J. Feldman et al, Proc FJCC 41(2), AFIPS (Fall1972). (See MAINSAIL).The Stanford Artificial Intelligence Language used at SAIL(the place). It was an ALGOL 60 derivative with a coroutiningfacility and some new data types intended for building searchtrees and association lists.A number of interesting software systems were coded in SAIL,including early versions of FTP and TeX and a documentformatting system called PUB.In 1978, there were half a dozen different operating systemsfor the PDP-10: WAITS (Stanford), ITS (MIT), TOPS-10 (DEC),CMU TOPS-10 (CMU), TENEX (BBN), and TOPS-20 (DEC, afterTENEX).SAIL was ported from WAITS to ITS so that MITresearchers could make use of software developed at StanfordUniversity. Every port usually required the rewriting of I/Ocode in each application.