System666 is a fast, powerful math language with assembler-like syntax. It has operations that allow it to do the four basic operations: addition, subtraction, multiplication, and division; plus the RAISE/RAISET operations allowing it to raise numbers to powers and the SQR/SQRT operations for getting the square roots of numbers. The language has console operations to take user input, display values of registers, and dump the values of all the registers for debugging.
Like all Zenon software, System666 is under the GNU GPL, so you can tailor it to your needs and share it with your friends, unlike most other software, where you have to wait for some multi-billion dollar sloth to fix things, and the software police come after you if you share their stuff with a friend.
System666 is, for all purposes, a dead project, but if you have PowerBASIC for DOS, you may be able to get this project somewhere good.