ARC is a coalition of academic, public, and special research libraries working together to facilitate the sharing of resources and services for the benefit of their collective users.
ARC began as the Worcester Area Cooperating Libraries (WACL) in 1967. In 2003, the libraries shaped ARC to become a vibrant committee within CMRLS. In 2010 CMRLS merged with the Massachusetts Library System. ARC members make decisions affecting the collaborative.
The ARC libraries house more than 3,800,000 volumes and more than 23,000 serial subscriptions. They serve an enrolled student body of approximately 26,000 as well as a total approximate population of 771,000 in the greater Worcester area.