One company, iPhoneSIMfree, said last month it had developed a software-only modification it planned to sell only to iPhone vendors.

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Any change in supplier or design would be "a pretty significant challenge, " the person said, requiring layers of modification from hardware to controlling software to adjust for a new battery.

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Dassault's software instead will allow designers anywhere to instantly know how a modification in their piece of the 7E7 will affect every other part of the plane.

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The programming language and its associated software libraries are designed to allow software developers to write programs that can run on otherwise incompatible computers with little modification.

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