NASA Webmasters, representing all NASA facilities, and reporting to the NASA Chief Information Officer, interpreted this to mean the top twenty websites for the aggregate of the Agency's numerous websites, irrespective of location.
Many centers operate several virtual servers on a single physical device.
Although hit counts are not a highly accurate means of measuring web visitation, it was used because all Centers could report visitation in terms of hit counts. These listings constitute an average of several months' worth of data taken during the Summer of 2000. If you have any difficulty viewing this page with adaptive technology, click here to let us know. This document last updated January 20, 2001.