Justice David Eady said that Google is not a publisher because searches are carried out entirely by computers and the search engine does not choose the terms itself.

The case was closely watched because the United Kingdom is perceived as having particularly stringent libel laws.

The ruling came in a suit by Metropolitan International Schools Limited, a British company which offers distance learning courses and trades under the brands of SkillsTrain or Train2Game, and previously as Scheidegger MIS.

MIS sued both Google UK Ltd. and the parent company, Google Inc., and Designtechnica Corp., incorporated in Oregon. The company's Web site hosts bulletin boards and forums that have carried allegedly defamatory complaints about Metropolitan International Schools.

Google cannot be "regarded as a publisher" for what its searches discover on the Web, the judge said in his ruling handed down Thursday, noting that Google had prevailed against similar suits in the Netherlands two years ago, and this year in cases in Spain and France.