Is SOL and Solana the same?

Excuse me, I'm a bit confused here. Could you clarify something for me? I've been hearing about SOL and Solana in the cryptocurrency circles, and I'm wondering if they're actually the same thing? I've seen them mentioned interchangeably in some forums, but I'm not entirely sure if that's accurate. Could you possibly explain the relationship between SOL and Solana, if there is any? I'd really appreciate it if you could break it down for me in a simple, straightforward manner.