In addition, we may also use clear gifs in HTML - based emails sent to our users to track which emails are opened and which links are clicked by recipients. (innocenceproject.org)
We tie the information gathered by clear gifs in emails to the personal information Web users may have provided to us. (buyersbrokersonly.com)
We may employ clear gifs (also known as web beacons) which are used to anonymously track the online usage patterns of our Users. (innocenceproject.org)