The Free On-line Dictionary of Computing (30 December 2018):

Stanford Artificial Intelligence Laboratory

    (SAIL) /sayl/, not /S-A-I-L/ An important
   site in the early development of LISP; with the MIT AI
   Lab, BBN, CMU, XEROX PARC, and the Unix community,
   one of the major wellsprings of technical innovation and
   hacker-culture traditions (see the WAITS entry for details).
   The SAIL machines were shut down in late May 1990, scant weeks
   after the MIT AI Lab's ITS cluster was officially
   decommissioned.

   [Jargon File]

   (2001-06-22)