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.