system remains. The first similar device made in the USA did not appear until 1985 and was manufactured by Validec. See also Psion Series 7 References External links Psion PLC at The Centre for Computing History Psion Organiser History - website by Steve Litchfield A detailed history of Psion around the time of the Series 5 at The Register Psion - the operational division of Psion PLC. [only the Psion name is preserved; no longer has any information related to the Psion Organiser II or any other Psion PDA] Psion devices Computer-related introductions in 1984 Personal information managers de:Psion#Psion Organiser