Are there 2 types of BNB?

Excuse me, I've been reading up on cryptocurrencies and I've come across BNB quite often. Could you clarify for me if there are indeed two types of BNB? If so, what are the key differences between them? Also, could you explain how these two types fit into the larger cryptocurrency and finance landscape? I'm trying to get a better understanding of this space and your expertise would be invaluable to me. Thank you for your time.