Advertising and advertisement services; Business information management; Business management; On-line trading services in which seller posts products to be auctioned and bidding is done via the Internet; On-line trading services in which users post requests for products and negotiate transactions via the Internet; Order fulfillment services; Providing a searchable online advertising guide featuring the goods and services of other on-line vendors on the internet; Providing a searchable online advertising guide featuring the goods and services of online vendors; Business invoicing services; Electronic processing of orders for others; Monitoring and tracking of package shipments to ensure on-time delivery for business purposes; On-line retail store services featuring a wide variety of consumer goods of others; Providing consumer product information via the Internet; Provision of an on-line marketplace for buyers and sellers of goods and services