Business

Contracts up for home sales

TRAVEL

A number of major airlines rolled back a weekend fare increase Monday, the first time in more than half a dozen attempts that a widespread price hike failed to take hold across the struggling industry.

“This could be the first sign that demand is softening,” said Graeme Wallace, chief technology officer of airfare research site FareCompare.com. “Up until now, the (airlines') statements have been that they expect demand to stay high.”

AMR Corp.'s American Airlines launched the $20 roundtrip increases across much of its domestic network Saturday. That move was quickly matched by many of its closest competitors, including UAL Corp.'s United Airlines and Delta Air Lines Inc. Associated Press

Technology

Scientists unveiled the world's fastest supercomputer on Monday, a $100 million machine that for the first time has performed 1,000 trillion calculations per second in a sustained exercise.

The technology breakthrough was accomplished by engineers from the Los Alamos National Laboratory and the IBM Corp. on a computer to be used primarily on nuclear weapons work, including simulating nuclear explosions.

But officials said the computer also could have a wide range of other applications in civilian engineering, medicine and science, from developing biofuels and designing more fuel efficient cars to finding drug therapies and providing services to the financial industry. Associated Press

Automotive

Nissan plans to launch its first “clean diesel” vehicle in Japan this fall and will send a prototype to next month's Group of Eight leaders' summit, where climate change tops the agenda, the carmaker said Monday.

Delegates attending the G-8 meeting in Toyako, in northern Japan, will be able to test drive Nissan's X-TRAIL diesel, a sport utility vehicle based on technology co-developed with French partner Renault SA. Associated Press

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