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 for fourth generation language
From The Free On-line Dictionary of Computing (30 December 2018) :

  fourth generation language
      (4GL, or "report generator language") An
     "application specific" language, one with built-in knowledge
     of an application domain, in the way that SQL has built-in
     knowledge of the relational database domain.
     The term was invented by Jim Martin to refer to
     non-procedural high level languages built around
     database systems.
     Fourth generation languages are close to natural language
     and were built with the concept that certain applications
     could be generalised by adding limited programming ability to
     When given a description of the data format and the report to
     generate, a 4GL system produces COBOL (or other 3GL) code,
     that actually reads and processes the data and formats the
     database+query+language+e.g.{SQL">Some examples of 4GL are: database query language e.g.{SQL;
     Focus, Metafont, PostScript, S, IDL-PV, WAVE,
     Gauss, Mathematica, and data-stream languages such as
     AVS, APE, Iris Explorer.

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