FWIW, everybody in the PDA space was influenced by General Magic. Two others that come to mind were Rex https://en.wikipedia.org/wiki/REX_5000 https://en.wikipe

FWIW, everybody in the PDA space was influenced by General Magic. Two others that come to mind were Rex https://en.wikipedia.org/wiki/REX_5000 https://en.wikipedia.org/wiki/REX_5000 and Geos https://en.wikipedia.org/wiki/GEOS_(16-bit_operating_system) https://en.wikipedia.org/wiki/GEOS_(16-bit_operating_system)