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Currently, I have developed two applications for the Psion organiser.
OptionCalculator is written for both the Psion Series 3a, 3c, 3mx and the Series 5, 5mx, 5mx Pro, Revo, Revo Plus, Diamond Mako and Ericsson MC 218. ProgrammingHelp is only available for de Psion Series 3a, 3c en 3mx. Push the following icons for a full description on the applications.

Software for the Psion Series 5, 5mx, 5mx Pro, Revo, Revo Plus, Diamond Mako and Ericsson MC 218:
newGo to OptionCalculator for the Series 5OptionCalculator, the smart calculator of option premiums.
Look at the screen demo first!
Software for the Psion Series 3a, 3c, 3mx:
Go to OptionCalculatorOptionCalculator, the smart calculator of option premiums.
Look at the screen demo first!
Go to ProgrammingHelpProgrammingHelp, the handy help when programming in OPL