The Psion returns! Meet Gemini, the 21st century pocket computer Psion, was a lion, in iron (Reg readers called it) 27 Feb 2017 at 13:49, Andrew Orlowski ... Martin Riddiford, the designer of the Psion Series 3 and Series 5 keyboards, and co-founder of Therefore, has come up with an entirely new design for the 21st Century. ...