Hewlett-Packard’s first handheld

Hewlett-Packard has played an exceptional role in the history of handheld computers. This company gave us truly remarkable palmtops 100LX/200LX, PDA iPaq hx4700 and Jornada 720. Some people still use these devices on a daily basis.
But what was the first handheld computer created by Hewlett-Packard?

You may consider HP-75C as the first HP handheld. The device is not very small, and the possibility of using it as a handheld is questionable.
But actually it depends on the criterias of a handheld computer.

Another candidate is the HP-67, which was introduced in 1976.
HP-67 was world’s first Turing-Complete handheld device. This is a strong argument in favor of transferring this device from calculators to the category of handheld computers.

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