AdmiralAK
Simply Daemonic
I believe that these were the first psion consumer PDAs available:
Here just for the collectors and the vintage users
http://www.armlink.ndirect.co.uk/s3mx.htm
http://www.zdnet.co.uk/pcmag/labs/1999/10/pocketpcs/r495.html
http://www.noodlebug.demon.co.uk/goingmob/chpsion.htm
http://www.psionplace.com/hardware/Psion-Siena-2000-09-05-psion-psion.html
http://www.the-gadgeteer.com/psion.html
Here just for the collectors and the vintage users

http://www.armlink.ndirect.co.uk/s3mx.htm
http://www.zdnet.co.uk/pcmag/labs/1999/10/pocketpcs/r495.html
http://www.noodlebug.demon.co.uk/goingmob/chpsion.htm
http://www.psionplace.com/hardware/Psion-Siena-2000-09-05-psion-psion.html
http://www.the-gadgeteer.com/psion.html