Apple Said to Lose Cheyer, Co-Creator of Siri Voice Unit

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Adam Cheyer, an engineer who helped build the Siri voice-recognition software that was acquired by Apple Inc., is no longer working for the iPhone maker, according to three people familiar with the situation.

Cheyer, a Siri co-founder and its former vice president of engineering, left recently after working in Apple’s mobile software group, said one of the people, who all asked not to be identified as the matter is confidential.