title: Is there any computer specific information besides the IP address for tracking?
body: <p>I am developing a program to that only allows the same computer to view a specific page once, and after that I am blocking access to that page.</p>
  
  <p>My question is, the IP address works ok but some users have a new IP every time they visit the site. I have come across other sites in the past that use some other means of tracking users, as even with a different IP on the same computer I can't view restricted content.</p>
  
  <p>Anyone have any thoughts?</p>
  
  <p>What are the other option(s) to the IP Address?</p>