This means the calculations quickly become too complicated for even a powerful computer to handle an arrangement involving more than a few atoms.

ECONOMIST: MONITOR

To protect against that, the law required that when investment managers give advice it must be based on either "unbiased" computer models or a "level-fee" arrangement where advisers aren't paid based on the investments participants buy.

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Through a UPS arrangement with 3Com, he can click on the UPS shield on the latest Palm VII handheld computer, enter a UPS tracking number and immediately learn the whereabouts of his goods.

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