V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):
MPL
       Mozilla Public License (Netscape)
The Free On-line Dictionary of Computing (30 December 2018):
MPL
   1.  An early possible name for PL/I.
   [Sammet 1969, p.542].
   2. MasPar data-parallel version of C.  See also ampl.
   Compiler version 3.1 (ftp://maspar.maspar.com/put/).
   3. Motorola Programming Language.  A low-level PL/I-like
   language, similar to PL/M, but for the Motorola 6800.
   4. MicroProgramming Language.  Simple language for
   microprogramming.  Statements on the same line represent
   register transfers caused by one microinstruction, and are
   executed in parallel.
   ["Structured Computer Organization", A.S. Tanenbaum, First
   Edition, P-H 1976. (Replaced in later editions by Mic-1)].
   (1995-03-07)