SAIL (programming language)
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 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 FTP and TeX, a document formatting system called PUB, and BRIGHT, a clinical database project sponsored by the National Institutes of Health.
A machine-independent version of SAIL called MAINSAIL was developed in the late 1970s and was used to develop many eCAD design tools during the 1980s. MAINSAIL was easily portable to new processors and operating systems, and was still in limited use as of 2005[update].
- Stanford Extended ASCII (SEASCII)
- Larry Tesler, PUB Manual
- Beebe, Nelson H. F. (2005). "Proceedings of the Practical TEX 2005 Conference: The design of TEX and METAFONT: A retrospective" (PDF). TUGboat. Salt Lake City, Utah, USA: University of Utah, Department of Mathematics. 26 (1): 39-40. Retrieved 2017-03-07.
The underscore operator in SAIL source-code assignments printed as a left arrow in the Stanford variant of ASCII, but PDP-10 sites elsewhere just saw it as a plain underscore. However, its use as the assignment operator meant that it could not be used as an extended letter to make compound names more readable, as is now common in many other programming languages. The left arrow in the Stanford variant of ASCII was not the only unusual character.
- Documentation for MAINSAIL.
- A SAIL Tutorial from the DECUS PDP-10 library tapes
- Stanford Artificial Intelligence Lab Memo AIM-289/SAILON 57.4: SAIL Manual August 1976
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