What is the difference between BNB and BNB?

Excuse me, could you please clarify something for me? I've noticed the term 'BNB' being used quite frequently in the cryptocurrency and finance world, but I'm a bit confused. Could you tell me the difference between BNB and... BNB? I'm not sure if I'm missing something here, but it seems to me that they're the same thing. Is there a distinction that I'm unaware of? Or am I misunderstanding the context in which these terms are being used? I'd really appreciate it if you could enlighten me on this matter.