Another early entrant into the then-$11 billion yellow pages industry occurred in 1997 when four Baby Bells banded together to create a co-branded Web site and initiated a $1 million marketing campaign to drive more traffic to their regional yellow pages sites. That "original yellow pages" site was simply a map of the United States, where users could click on any state and be linked to the appropriate online directory, as published by Ameritech, BellSouth, Pacific Bell, or US West. The site experienced stiff competition from Big Yellow (now part of SuperPages) and SuperPages itself.