Walgreen Company is a national drugstore chain with 3,619 drugstores in 43 states and Puerto Rico as of January 14, 2002. The drugstores are engaged in the retail sale of prescription and nonprescription drugs, and carry additional product lines such as general merchandise, cosmetics, toiletries, household items, food and beverages. Customer prescription purchases can be made at the drugstores as well as through the mail, by telephone and on the Internet.