As a user of this site, you will fall into one of following four categories:
* an anonymous user *
* a guest user *
* a trial subscriber *
* a paying subscriber *

Anonymous users have limited access to a subset of the tools on this site.

Guest users, who are identified by their IP address, have limited access to all tools, but for only 24 hours.

Trial subscribers have additional limited access to all tools on this site during their trial period.

Paying subscribers have on-going access to the AS Analysis Tool inline with their chosen subscription and full access to the rest of the site.

To subscribe, log-in or initiate a 24hr guest subscription, use the links on the homepage which you can go to by clicking any page banner on the site.