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Development
Programmers' FAQ, Psion OPL Programming Reference, Twiddlebit Software
Dynasys-Psion Solutions Provider
Accessories for Psion WorkAbout
Konstantin Saliy
Software for the S3a, programmers' FAQ and a Russian Psion page (Windows 1251).
Kylom
Productivity software for Symbian phones.
Personal Web page for M.C.Wheadon (mcw@ukc.ac.uk)
Patsiena - Patience on your Siena
Phil Spencer
Popular shareware and freeware programs for the Psion 3a, 3c, Siena, Series 5 and Geofox-One machines.
Psion General Utilities
General Utilities for SIBO.
SeePsion
Read, write directly Psion Base serial 3 with logical synchronization. For PC Windows 95, 98, NT.
The Psionics Files
A project for collating information about programming the Psion Series 3 and 3a which is not in the manuals provided with the machines.