Win16 and Win32 API, Posix, Motif, DDE and NetDDE, RPC, COM, ODBC, SQL;
MS-DOS, Windows 3.x/95/NT/W2K/XP,Linux, SCO Unix, Sun Solaris, OS/370, VM/SP;
As main: C++, C, Pascal, Assembler for any platforms, PL/1, Fortan, Visual Basic for Application, Algol 60, MS SQL Server and Sybase SQL Anywhere, MS Access.
As addition: Visual Basic, Smaltalk, Ada, Algol 68, Prolog, Lisp, Oberon, Forth, REXX; Oracle, dbVista, FoxPro.