sentence: languages ( not every language is available on every platform listed ) : basic cobol c c++ egl fortran java pacbase pl/i ibm rpg smalltalk platforms : ibm aix os/2 i5/os ( formerly named os/400 ) linux mac os x microsoft windows tpf z/vm z/os ( formerly named os/390 , mvs ) z/vse evolution most of the members of the visualage family were written in smalltalk no matter which language they supported for development .