A method for using an internet accessible computer system to conduct
business to business operations among a plurality of buyer companies and
a plurality of seller companies. In one embodiment, the method includes
the steps of registering each of the plurality of seller companies with
an internet accessible computer system, wherein each of the plurality of
seller companies sells goods to a corresponding one of the plurality of
buyer companies, and the corresponding one buyer company makes payment
for the goods sold by that seller company; and registering each of the
plurality of buyer companies with the internet accessible computer
system, wherein the registration of each of the plurality of buyer
companies depends on the registration of its corresponding seller
company.