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TheoryPDA was a line of personal digital assistants designed and marketed by Theorysonic. Their main operating system is PTSUG, and the first generation model was released in 1991.

History and availability[]

Development of what was to become the TheoryPDA began in 1987. It was first sold in 1991, starting in El Kadsre. The first generation model shipped with 35-pin charging connector, it was replaced by MetroCon with fourth generation model.

Decline[]

Sales of TheoryPDA begin to decline in 1997, after the success of TheoryPhone.

Production[]





Hardware[]





Software[]

The TheoryPDA runs Portosic OS from 1997 onwards, previously used TS-UGOS for TheoryPDA from 1991 to 1997.

Applications[]





Reception[]

The TheoryPDA has received positive reviews.

Gallery[]

See also[]

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