MassCat is a library catalog of holdings from school, medical, law, special and a few public libraries. The MassCat catalog contains materials from libraries with very diverse holdings. Some examples include:
- Primary documents on the Massachusetts textile industry before the 20th century
- Sheet music for compositions of obscure composers
- Building code requirements for all kinds of structures
While some of the more specialized and intriguing materials cannot be taken out of the library, MassCat member libraries are committed to sharing their resources. We invite you to search the database and should you find items of interest, you are encouraged to contact the MassCat library to arrange an appointment to view their most specialized materials.

