"The numerous operating systems (OSes) in different personal digital assistants (PDAs) would baffle most tech newbies. Minus the lesser-known and extinct PDA OSes (some of which are proprietary), you are left with Palm OS, Microsoft'sPocket PC, Symbian and Linux. A good OS makes or breaks the PDA initiative of a PDA hardware manufacturer.
"For a while, manufacturers were split into two main camps after Psion (the people who brought us Epoc, which is now called Symbian) left the foray: Palm OS and Pocket PC. And after the failed attempt by Apple (Apple Newton Messagepad), Palm OS dominated the PDA OS scene for a long while..."
