L
LD - Labor Department (Department of Labor) (cabinet-level agency which deals with labor and employment issues, conflicts between unions and company management, and economic issues, such as consumer prices - maintains the data for the consumer price index)
LM - Land Management (Bureau of Land Management) (agency within the Interior Department created in 1946 to manage federal lands)
LOC - Library of Congress (national library established to collect, house, catalog and archive books and publications)