To Find Individuals. Switchboard contains millions of people, and you can search it in a variety of ways, including city, state, name, and area code. To Find Associations. You can find entire bodies of people all interested in the same topic by locating associations. Dentists belong to a dental association.
Engineers join an engineer's association.
You get the picture. There you have it. Those are my five ways for finding buried treasure online. But I can't leave you without saying that knowing what key words to type in is a necessary skill for locating what you want online. You'll freeze your keyboard with all the results the search engines will bring to you.