PS Business Parks, Inc. (AMEX: PSB) is a publicly traded full service real estate company with expertise in acquisitions, development, leasing and property management. As of December 31, 2003, PS Business Parks owned or managed 19.5 million square feet of industrial, office, retail and \"flex\" properties located in 9 states. Of this total, 18.3 million square feet was owned by PS Business Parks and an additional 1.2 million net rentable square feet was managed for other owners.