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 for Objective C
From The Free On-line Dictionary of Computing (30 December 2018) :

  Objective C
      An object-oriented superset of ANSI C by Brad
     Cox, Productivity Products.  Its additions to C are few and
     are mostly based on Smalltalk.  Objective C is implemented
     as a preprocessor for C.  Its syntax is a superset of
     standard C syntax, and its compiler accepts both C and
     source+code+({filename+extension">Objective C source code ({filename extension ".m").
     It has no operator overloading, multiple inheritance, or
     class variables.  It does have dynamic binding.  It is
     used as the system programming language on the NeXT.  As
     implemented for NEXTSTEP, the Objective C language is fully
     compatible with ANSI C.
     Objective C can also be used as an extension to C++, which
     lacks some of the possibilities for object-oriented design
     that dynamic typing and dynamic binding bring to Objective
     C.  C++ also has features not found in Objective C.
     MS-DOS,+Macintosh,+VAX/{VMS">Versions exist for MS-DOS, Macintosh, VAX/{VMS and
     Unix workstations.  Language versions by Stepstone,
     NeXT and GNU are slightly different.
     There is a library of ({GNU) Objective C objects by
     R. Andrew McCallum  with similar
     functionality to Smalltalk's Collection objects.  It
     includes: Set, Bag, Array, LinkedList, LinkList,
     CircularArray, Queue, Stack, Heap, SortedArray,
     MappedCollector, GapArray and DelegateList.  Version: Alpha
     Release.  ftp://iesd.auc.dk/pub/ObjC/)">(ftp://iesd.auc.dk/pub/ObjC/).
     See also: Objectionable-C.
     ["Object-Oriented Programming: An Evolutionary Approach", Brad
     Cox, A-W 1986].

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