A decade ago there seemed to be only two major PDA players battling for users’ hearts and minds.  Palm and Psion snaffled much of the business up, and the mobile handset companies like Nokia (9000) and Alcatel (One Touch Com) had little market share. 

Forward 10 years and the battlefield is quite different.  Palm OS has all but expired, Psion has transformed into Symbian, which is seeing a plethora of competition from Microsoft, BlackBerry, Apple, Google, other Linux offshoots, and Java.  Each have their own strengths despite the variety being inconvenient to the networks.  One unfortunate possibility is that Palm will disappear.