One of the founders of Foursquare is Dennis Crowley. The other is Naveen Selvadurai. I know you didn't ask for both but I wanted to give them to you just in case. I hope this helps! (:
<span>There are some network modeling tools that can scan the existing network.</span>
Explanation:
The Name is called, (navigation menu..)
to direct users 2 info., they look up...
It is responsible for transmitting these bits as signals over a wire, optical fiber, wireless, or other <span>medium.</span>
A. Citing sources for documents you found on the web