Nielsen gives clients a more complete view of their markets and a better understanding of their consumers through our combined insights, experiences, knowledge, market intelligence ...
http://www.nielsen.com/

Nielsen Media Research defines the global standard in online audience measurement. You can rely on the syndicated, customized media and market research to stay informed ...
http://www.nielsenmedia.com/nc/portal/site/Public/

Nielsen Online measures and analyzes web audiences, advertising and commerce. What is your business challenge? Nielsen Online measures vocal, empowered, and engaged online ...
http://nielsen-online.com

Nielsen Ratings are audience measurement systems developed by Nielsen Media Research to determine the audience size and composition of television programming.
http://en.wikipedia.org/wiki/Nielsen_Ratings

Alertbox column, Web usability, usability engineering, and Jakob's minimalist approach to Web design; Jakob's biography. Conferences and training events.
http://www.useit.com/