What BTC means?

Excuse me, I'm a bit confused about something. Could you possibly explain to me what BTC stands for? I've been hearing this abbreviation everywhere in the context of cryptocurrencies and finance, but I'm not entirely sure what it means. Is it related to a specific type of digital currency? Or does it refer to a particular aspect of the cryptocurrency world? I'm trying to wrap my head around this complex field, and your explanation would be greatly appreciated.