well i assume you just want a list of forth generation languages General Use / Versatile IBM VisualAgen/VisualAge Generator SQLWindows/Team Developer Forté TOOL (transactional object-oriented language) SheerPower4GL (Microsoft Windows Only) PowerBuilder WinDev DataFlex Visual DataFlex (Microsoft Windows Only) Database query languages FOCUS NATURAL Informix-4GL Genero Progress 4GL SQL SB+/SystemBuilder Report generators Quest Report Builder BuildProfessional GEMBase IDL-PV/WAVE LINC Metafont NATURAL Oracle Reports PostScript Progress 4GL Query/Results RPG-II Gauss Data manipulation, analysis, and reporting languages Clarion Programming Language Ab Initio ABAP ADS/Online (plus transaction processing) Aubit-4GL Audit Command Language CorVision Culprit DASL FOCUS Genero GraphTalk Informix-4GL LANSA Maple MAPPER (Unisys/Sperry) now part of BIS MARK-IV (Sterling/Informatics) now VISION:BUILDER of CA Mathematica MATLAB NATURAL Nomad PL/SQL Progress 4GL PROIV Ramis S SAS SPSS Stata Synon Xbase++ Data-stream languages APE AVS Iris Explorer Database driven GUI Application Development Genexus Progress Dynamics UNIFACE SB+/SystemBuilder Screen painters and generators FOURGEN CASE Tools for Rapid Application Development by Gillani Genero Studio Oracle Forms Progress 4GL ProVision Unify Accell SB+/SystemBuilder GUI creators 4th Dimension (Software) eDeveloper MATLAB's GUIDE Omnis Studio OpenROAD Progress 4GL AppBuilder Revolution programming language Web development languagues ColdFusion

fourth generation language...............

4gl

It Means 4th Generation Language. Just like 2GL and 3GL . 2nd and 3rd generation languages respectively, the 4GL language derived from refinements and additions to the former GL versions.

1970-1990 mostly ! that's what i know about this =)

A compiler and a linker.