B2B - Business to Business
It is a mode of conducting business among two or more companies over the Internet, rather than more traditional modes like as telephone, mail, and face to face.
In the past EDI was conducted on a direct link of some form among the two businesses where as today the most popular link is the Internet.
The two businesses pass information electronically to each other. B2B e-commerce at present makes up about 94% of all e-commerce transactions.