I'm not sure if I'm even asking this in the right section. This is new territory for me. I'm considering building a site that needs a starting base of businesses listed in my directory. In one case, it's national, but starting out locally. In another case, it's a certain industry. I'm not even sure how to search for this capability --what keywords to use! Can anyone help? webcrawlers? a service I have to pay for? Hope not. I'd rather buy a tool.