TUNIS, Tunisia — The United States, in a fit of bravado and confident smiles, claimed victory this week in the contest to keep control of the computers crucial for directing Internet traffic.

But approval yesterday of a plan to leave Washington squarely in charge hasn't fully ended the debate: The European Union and a host of other countries are suggesting that a new multinational forum, which delegates to a U.N. technology summit also agreed to set up, simply delays the battle for another day.

The forum, they say, still could ultimately leave several countries — and not the United States alone — with key decisions about domain names and the computers that direct the Internet's flow of information, commerce and dissent.

The computers under dispute, known as root servers, act as the Internet's master directories so Web browsers and e-mail programs can find other computers. Users worldwide check those directories millions of times a day without ever knowing it.

Although Pakistan and other countries sought a takeover of the directories by an international body such as the United Nations, negotiators ultimately agreed late Tuesday, as time ran out, to a create an open-ended, nonbinding international forum for raising important Internet issues.

As the three-day U.N. World Summit on the Information Society ended yesterday, delegates from 174 countries approved a five-page platform outlining the future of Internet governance along with prescriptions for expanding access worldwide and guarding the free flow of information, ideas and knowledge.

U.N. Secretary-General Kofi Annan is expected to convene the new Internet Governance Forum early next year. A precise location had not yet been selected, though Greece has offered to host.

Details of the forum's agenda were still being worked out, but organizers said it would bring together government, business and civil leaders and could cover spam, cybercrime and other issues beyond the addressing system.

Because negotiators had watered down language of the platform to reach agreement, many questions remain about how the forum might influence the United States and the quasi-independent agency to which it has delegated authority, the Internet Corporation for Assigned Names and Numbers, or ICANN.

Negotiators on both sides said that the talks, which began in earnest on Sunday, were fierce before a final decision was reached the night before the summit's opening.

"The real result of WSIS (World Summit) is that the debate over ICANN and Internet governance will be prolonged for another five years," said Milton Mueller, an Internet governance expert at Syracuse University. "The U.S. can claim a short-term victory but faces a long-term war of attrition that will gradually erode its position."

Annan was blunt in his assessment.

"The United States deserves our thanks for having developed the Internet and making it available to the world," the U.N. head told delegates. "But I think you also all acknowledge the need for more international participation in discussions of Internet governance issues."