This document discusses direct marketing between businesses (B2B). It defines B2B as commerce transactions between organizations like manufacturers, wholesalers, and retailers. The key sectors of the B2B market are producers, middlemen, government units, and non-profits. B2B marketing has specific characteristics including smaller numbers of larger buyers, geographic concentration of buyers and sellers, and close buyer-seller relationships. The major advantages of B2B marketing are a larger market, global expansion opportunities, and reduced costs through efficiencies. Potential disadvantages include supply shortages, unknown suppliers, and less face-to-face contact.