What type of abbreviation is BSc?

Can you please explain to me what kind of abbreviation the term "BSc" stands for? I'm not entirely sure of its meaning and I'm curious to learn more about it. I've seen it mentioned in several academic and professional contexts, but I'm not sure if it refers to a specific field of study or a certain level of education. Clarifying this would greatly help me in understanding the context and significance of this abbreviation.