Cape Libraries Automated Materials Sharing (CLAMS) is a non-profit, cooperative association of libraries on Cape Cod, Martha’s Vineyard, and Nantucket, that share resources through a computer network with terminals located in each member library. Use of a single CLAMS library card allows patrons to borrow books and other materials from all member libraries.The shared system gives library card holders access to over 1.5 million items including books, magazines, and non-print resources.In 2010/2011 the number of checkouts for books, dvd’s, and other materials by CLAMS library users was over 3.5 million. Savings are achieved through cooperative development of library collections. Technical support and training is provided to member libraries and their staff from a central site. Delivery between CLAMS libraries is made possible through the Massachusetts Library System (MLS).