| Financial information: |
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| Amsterdam Exchanges | Great link for Dutch option investors. Does not only give information on premiums in all option series, but gives also information on the current stock prices. Besides that, you have the opportunity to compose your own (free) portfolio. |
| Iris Online | Iris Online has a lot of information on current option premiums with a delay of about 15 minutes. |
| Het Financieele Dagblad | Link to Het Financieele Dagblad (Dutch financial newspaper). |
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| Psion software and documentation: |
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| Tucows PDA | Lots of software for the Psion organiser. All applications are tested, and have a rating. |
| 3Lib of UK Online | Various useful software applications for the Psion, and lots of handy programming tips. A lot of Psion programmers are listed here to, including their Email address. |
| Psion 3a Programming Reference | De OPL programming manual for the Series 3a. |
| Psion Gebruikers vereniging NL | The Dutch Psion Usergroup. Members have access to a helpdesk, two monthly magazine, BBS, free entrance at user meetings, discount on sales, registrations, palmtop from dealers, and lots more. |
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| Psion sites: |
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| Psion BV | Link to the Dutch site of Psion. |
| Psion PLC | Link to the global site of Psion. |
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| Interesting sites for developers: |
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| EPOC World | Everything you want to know when programming in EPOC. |
| JavaScript Manual | Handy reference on JavaScript. |