u/bumblfumbl

I figured of the library-related subreddits, someone who knows the answer is more likely to be here? I am working on some classwork related to metadata, and I'm trying to use the LCSH. I can't find anywhere the key or legend to what the two letter codes mean on these lists. It's obvious that USE means that that is the controlled vocabulary term... but what does UF mean? BT, RT, NT, SA?

https://preview.redd.it/umxyfpwx7gah1.png?width=281&format=png&auto=webp&s=e0c4d061b7a33c09c2b4334b95356b414bd6a3dd

https://preview.redd.it/qtbywp5z7gah1.png?width=342&format=png&auto=webp&s=63ef3f5699d9b3e2df8806d1daea949561da2a30

Thanks!