ON-LINE BUSINESS TO BUSINESS ORDERING SERVICES; COMPUTER SERVICES, NAMELY, PROVIDING A BUSINESS DIRECTORY DATABASE, PROVIDING SEARCH ENGINES FOR OBTAINING DATA ON A GLOBAL COMPUTER NETWORK; ADVERTISING FOR OTHERS VIA AN ON-LINE ELECTRONIC COMMUNICATIONS NETWORK; EXCHANGE SERVICES, NAMELY, ON-LINE BARTERING OF GOODS FOR OTHERS; AUCTIONING ON-LINE; ON-LINE BUYING CLUBS; OPERATING A PORTAL WEB-SITE