let's talk terrible acronyms for a sec. we've got:
OSS stands for "Open Source Software", but it also more commonly meant "my sound isn't working" back in the 2000s.
FOSS stands for "Free and Open Source Software" which is nice if you want to loop in the license enthusiasts or emphasize the value you place on your own time
FLOSS which is when you add Libre in hopes that people will think you're a harmless libertarian instead of the other thing when you're always going on about "freedoms"
