Open Source is not bad, but Free Software is better:
Freedom 0: The freedom to use the program for any purpose.
1: The freedom to study how the program works, and change it to make it do what you wish.
2: The freedom to redistribute and make copies so you can help your neighbor.
3: The freedom to improve the program, and release your improvements (and modified versions in general) to the public, so that the whole community benefits.







