Which acronyms are you referring to? I'll just take a wild stab in the dark and tell you that FreeBSD stands for Freely (available) Berkeley Software Distribution.
See https://en.wikipedia.org/wiki/Berkeley_Software_Distribution
Then https://en.wikipedia.org/wiki/FreeBSD
I always have this complaint when I see SMB, or other soft (not software) business term acronyms
Biting the hand that feeds IT
