ROM Abbreviation Confusion

Okay. I'm pretty sure this is the forum for this... anyway.On most of my ROMs, I'll find these odd little abbreviations at the end of the filenames. For example:Megaman (U) [b1][o1].nesI know about the region code, but the stuff after that, in brackets, confuses me. If someone could provide a list of the abbreviations and what they mean, or just a link providing that information, I'd be greatly appreciative. Thanks.

https://www.romulation.org/forum/index.php/topic,1359.0.htmlThere you go, hope that helps.

Eheh... Sorry. I guess I didn't look hard enough. Then again, I didn't know exactly what to look for in the first place, so... yeah. Thanks!

Thanks Reider
it was really confusing me too