Some of our websites may contain electronic images known as web beacons (sometimes known as clear gifs) that allow us to count users who have visited these pages. Web beacons collect only limited information which includes a cookie number, time and date of a page view, and a description of the page on which the web beacon resides. We may also carry web beacons placed by third party advertisers. These beacons do not carry any personally identifiable information and are only used to track the effectiveness of a particular campaign.