Delphi may collect and store information about your visit on an anonymous, aggregate basis. This information may include the time and length of your visit, the pages you looked at on our website, the PDF files you downloaded, and the site you were referred to ours by. We may also record the name of your Internet Service Provider. This information is only used to measure activity on our site and to develop ideas for improving our site. We make no attempt to identify individual visitors of our site. If you send us a question, request for information or other communication which identifies your email address we will save your email address for the purpose of sending you promotional materials in which we think you may be interested. You also may receive such promotional materials by clicking the convenient button that has been included on our website for that purpose. As always, you can opt out of receiving any further offers or promotional messages by following the instructions at the end of the message. Delphi sites requiring login may have different policies.