Additional reasons for amending a return are listed in the instructions.

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Because modern engines, drivetrains, and brakes already receive their instructions via electronic signals, there is surprisingly little need for additional mechanical parts.

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Customers who purchased from parallels.com or have a registered product activation key will automatically be emailed instructions on how to upgrade to Parallels Desktop 8 at no additional cost.

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But instead of this approval, they got complicated instructions from the FDA. "We sent them a pile of additional clinical studies, " Gillis says.

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