4GL
↑ IBM VisualAgen/VisualAge Generator
↑ PowerBuilder
↑ Visual DataFlex
1 2 FOCUS
↑ Informix-4GL
1 2 3 NATURAL
↑ Progress OpenEdge
↑ BuildProfessional
↑ LINC
↑ Oracle Reports
↑ Progress OpenEdge
↑ Ab Initio
↑ Audit Command Language
↑ Clarion Programming Language
↑ Informix-4GL
↑ Progress OpenEdge
↑ XBase++
↑ Genexus
↑ UNIFACE
↑ FOURGEN
↑ Oracle Forms
↑ Omnis Studio
↑ OpenROAD