This U.S. industry comprises establishments primarily engaged in retailing new window treatments, such as curtains, drapes, blinds, and shades. Cross-References. Establishments primarily engaged in-- ? Retailing window treatments via electronic home shopping, mail-order, or direct sale--are classified in Subsector 454, Nonstore Retailers; and ? Retailing custom curtains and draperies made on premises--are classified in U.S. Industry 314121, Curtain and Drapery Mills.