We want to send a postal mailing to companies of a certain category for advertising. One of the way to find those companies is to google certain key words, and find their addresses via their websites. The other way is to use sites such as online yellow pages.

However, importing/editing all those addresses manually takes a lot of time and there is probably a way to streamline this process.

Would you know by chance a software application doing this automatically, just with a click of a button? Thanks in advance.