Boston Properties Limited Partnership owns and develops real estate properties in the United States. As of March 31, 2010, the company owned or had interests in a portfolio of 143 commercial real estate properties aggregating approximately 37.6 million net rentable square feet comprising 137 office properties, including 118 Class A office properties and 19 office/technical properties; 1 hotel; 3 retail properties; and 2 residential properties. It also owned or controlled undeveloped land parcels totaling approximately 510.1 acres. The company’s properties are located primarily in Boston, Massachusetts; Washington, DC; midtown Manhattan, New York; San Francisco, California; and Princeton, New Jersey. Boston Properties, Inc. operates as the general partner of the company. Boston Properties Limited Partnership is headquartered in Boston, Massachusetts. Boston Properties Limited Partnership operates as a subsidiary of Boston Properties Inc.