MovieLens
... that in recommending their products, Amazon.com originally used the technology behind MovieLens, a website that suggested films to its users based on their preferences?
... that in recommending their products, <a class="mw-redirect" href="./Amazon.com" id="mwBVg" rel="mw:WikiLink" title="Amazon.com">Amazon.com</a> originally used the technology behind <b id="mwBVk"><a href="./MovieLens" id="mwBVo" rel="mw:WikiLink" title="MovieLens">MovieLens</a></b>, a website that suggested films to its users based on their preferences?