npl

3 definitions found

npl - Free On-line Dictionary of Computing (26 May 2007) :

  NPL
  
     1. New Programming Language.  IBM's original (temporary) name
     for PL/I, changed due to conflict with England's "National
     Physical Laboratory."  MPL and MPPL were considered before
     settling on PL/I.  Sammet 1969, p.542.
  
     2. A functional language with pattern matching designed by
     Rod Burstall and John Darlington in 1977.  The language
     allowed certain sets and logic constructs to appear on the
     right hand side of definitions, E.g.
  
     	setofeven(X) <= <:x: x in X & even(x) :>
  
     The NPL interpreter evaluates the list of generators from
     left to right so conditions can mention any bound variables
     that occur to their left.  These were known as set comprehensions
     .  NPL eventually evolved into Hope but lost
     set comprehensions which were called list comprehensions in
     later functional languages.
  
     [John Darlington, "Program Transformation and Synthesis:
     Present Capabilities", Research Report No. 77/43, Dept. of
     Computing and Control, Imperial College of Science and
     Technology, London September 1977.]
  
     3. NonProcedural Language.  A relational database language
     developed by T.D. Truitt et al in 1980 for Apple II and
     MS-DOS.
  
     ["An Introduction to Nonprocedural Languages Using NPL",
     T.D. Truitt et al, McGraw-Hill 1983].
  

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

  NPL
         Netscape Public License (Netscape)
         

  NPL
         Non-Procedural Language