eGroups Inc. said Tuesday that it has adopted a directory from Netscape to classify its directory of 600,000 separate e-mail groups. The company, based in San Francisco, said the move means it will be more effective in targeting e-mail and Web banner advertising tied to the interests of individuals and groups. eGroups provides a service that allows people to access e-mail groups that match their interests by keying in words in a search engine. Netscape's directory, called Open Directory Project, has relied on voluntary submissions from volunteer Web editors, who help organize sites based on subject and usability. To date, it lists 1.7 million Web sites in 250,000 categories. The announcement was made at the @d:tech World Conference in San Francisco.