Founded in 1882, the Coop operates student-oriented stores offering a wide selection of textbooks, general-interest books, office supplies and school insignia merchandise, including Harvard and M.I.T. gear. Members are entitled to annual rebates based on their purchases. You do not have to be a member to shop here, however. Shop at Harvard Square Coop and you are sure to vouch for the quality of goods and friendly service offered by this store.