Over the years I have used the following programming languages

C#

C++

C

Java - Sun Certified Programmer for Java 2

Forth

8051 assembler

Z80 assembler

6502 assembler

Z8 assembler

PIC assembler

Basic

PLM/51

I have also programmed for the following environments

.NET

Windows 95/98/NT/2000/XP (32 bit)

Windows 3.11 (16 bit)

Linux

DOS

Real time operating system RTKernel-32

Real time operating system Pharlap ETS Kernel

Apple Macintosh