Product supply and procurement exchanges, where a
company purchasing agent can shop for supplies from vendors,
request proposals, and, in some cases, bid to make a purchase at a desired price. Sometimes referred to as e-
procurement sites, some serve a range of industries and others focus on a niche market.
Company Web sites, since the target audience for many company Web sites is other companies and their employees. Company sites can be thought of as round-the-clock mini-trade exhibits. Sometimes a company Web site serves as the entrance to an exclusive extranet available only to customers or registered site users. Some company Web sites sell directly from the site, effectively e-tailing to other businesses.