GENERAL SERVICES ADMINISTRATION (GSA) SPECIAL ITEM NUMBERS

54 – PRE-ENGINEERED, PRE-FABRICATED BUILDINGS AND SMOKING SHELTERS

GSA is an independent agency of the United States government, established in 1949 to help manage and support the basic functioning of federal agencies. The GSA supplies products and communications for U.S. government offices provide transportation and office space to federal employees, and develops government-wide cost-minimizing policies, among other management tasks.

Wikipedia.com