Software that is not free software or semi-free software (the same thing as free software except that it can only be used for non-profit things).
Windows is an example of proprietary software.
von a thing 11. Juni 2005
Proprietary software is software that you are not free to use, copy, modify, and study as you like. It's a form of abuse of users, which sucks and makes people depressed; it gives suits power over creatives.
Skype is extremely proprietary software.
von your real name! 29. Juni 2009