What is FOSS
(Free / Open Source Software)
"Briefly. OSS/FS programs are programs whose licenses give users the freedom to run the program for any purpose, to study and modify the program, and to redistribute copies of either the original or modified program (without having to pay royalties to previous developers)"
~ David Wheeler
"Free and open source software, also F/OSS, FOSS, or FLOSS (for Free/Libre/Open Source Software) is software which is liberally licensed to grant the right...."
~ Wikipedia