There are a lot of phrases that are quite useful when talking about musical theater online. If you are confused, here are some of the shorthand phrases that are used online:
GENERAL
MT -- musical theater
MY D -- my daughter
MY S -- my son
SCHOOLS
CCM -- University of Cincinnati - College Conservatory of Music
BOCO -- Boston Conservatory
The rest of the schools are pretty self-explanatory, but these can be confusing.