This industry comprises establishments primarily engaged in creating and designing public display advertising, campaign materials, such as printed, painted, or electronic displays, and/or placing such displays on indoor or outdoor billboards and panels, or on or within transit vehicles or facilities, shopping malls, retail (in-store) displays, and other display structures or sites. Providing sign lettering and painting services--are classified in Industry 541890, Other Services Related to Advertising; Printing paper on paperboard signs--are classified in Industry 323110, Printing; Erecting display boards--are classified in Sector 238990, All Other Specialty Trade Contractors; and Manufacturing electrical, mechanical, or plate signs and point-of-sale advertising displays--are classified in Industry 339950, Sign Manufacturing.