This industry comprises establishments primarily engaged in retailing all types of merchandise using non-store means, such as catalogs, toll free telephone numbers, or electronic media, such as interactive television or computer. Included in this industry are establishments primarily engaged in retailing from catalog showrooms of mail-order houses. Store retailing or a combination of store retailing and non-store retailing in the same establishment--are classified in Sector 44-45, Retail Trade, based on the classification of the store portion of the activity; Facilitating business to business electronic sales of new and used merchandise on an auction basis using the Internet--are classified in Industry 425110, Business to Business Electronic Markets; and Providing telemarketing (e.g., telephone marketing) services for others--are classified in Industry 56142, Telephone Call Centers.