Free Software, Open Source and Proprietary Software is different views on which right the users should have on the software they use (modify, study, redistribute or sell the software).
Free Software Foundation is all about freedom to the people and letting the people choose to do whatever they want with the software (Modify, study, redistribute or sell), but the licence must follow the software.
Open Source Initiative is for freedom to the people and are more business friendly than Free Software since they make it possible to add some restrictions, but they have a list of criteria the licence must follow in order to be open source software.
proprietary software is more concerned with the producer and restrict users by having copyright, patents and closed source code.
