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'''SAIL''', the '''Stanford Artificial Intelligence Language''', was developed by Dan Swinehart and [[Bob Sproull]] of the [[Stanford AI Lab]] in 1970. It was originally a large [[ALGOL 60]]-like language for the [[PDP-10]] and [[DECSYSTEM-20]].
SAIL's main feature is a symbolic data system based upon an associative store (based on the [[LEAP (programming language)|LEAP system]] of Jerry Feldman and Paul Rovner). Items may be stored as unordered sets or as associations (triples). Other features include processes, events and interrupts, contexts, [[backtracking]] and record garbage collection. It also has block-structured macros, a coroutining facility and some new data types intended for building search trees and association lists.
A number of interesting software systems were coded in SAIL, including some early versions of [[File Transfer Protocol|FTP]] and [[TeX]], a document formatting system called PUB, and the first general purpose, interactive spreadsheet program called BRIGHT.
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