The Cape Libraries Automated Materials Sharing (CLAMS) library network is a non-profit, cooperative association of thirty-five member libraries and thirty-eight locations located throughout Cape Cod, Martha's Vineyard, and Nantucket. Since founded in 1991, the network has registered over 255,000 cardholders. It completes over 3.5 million transactions per year. The number of items available has grown from 568,000 in 1991 to over 1.6 million in 2014.