spl/1

from The Free On-line Dictionary of Computing (8 July 2008)

SPL/I
SPL/1

   Signal Processing Language One.

   (Or "SPL/1") A language designed by {Intermetrics} for
   acoustic {signal processing}.  It has graphics and
   multiprocessing features.

   ["SPL/I Language Reference Manual", M.S. Kosinski,
   Intermetrics Report 172-1 (July 1976)].

   (1995-01-19)

from V.E.R.A. -- Virtual Entity of Relevant Acronyms (June 2006)

SPL1
       Simple visual Profile @@ Level 1 (MPEG, QCIF), "SP@@L1"