I develop in Visual Basic 6, Access 97/2000, DHTML and Turbo Pascal 6,7; HTML and Java Script. I've programmed data bases, information systems and scientific programms.
I've developed programming with GPSS/H and SIMNET. These languages are designed for Simulation problems, for example,when you want to analyse and simule the number of cars that arrive to the shopping center, or the number of persons who visit the bank, and you want to decide how many workers you need for attending your clients. You can "predict" or analyze the behavior of your problems.