# Using OpenEpi

OpenEpi includes calculators as local files and also links to calculators and other information on the Internet. If you have a constant Internet connection on this machine, you may not notice the difference. If, however, you are operating without an Internet connection, some menu entries may return with a message that the page cannot be found.
The calculators are arranged so that you can choose an epidemiologic purpose, a data description, or a particular statistical procedure. Hence, there may be several ways to reach the same calculator. If you are unsure what procedure is appropriate, there is a menu choice under HELP that will do a Google search for any of a large number of procedures recommended for different purposes.
OpenEpi is evolving, and you will see gaps, missing pages, and very spotty coverage until things are further along. The JavaScript statistical portal under STATISTICS is quite mature, however, and will provide almost any kind of calculator if you are on line.