[_Microft]

Following the links leads to the Open Broadcast Studio project at https://obsproject.com/

I concur that letting non-obvious abbreviations stand is a bad thing because it wastes the time of N readers who would need to look it up while it saves the effort for 1 writer who already knows and only has to write it out. This is inefficient.

[usr1106]

I guessed it could not possibly be the only OBS I was aware of https://openbuildservice.org/