There are Pocket PC 2002 (Phone Edition), Windows CE .NET and Windows CE 4.x.
Pocket PC will be for the portrait oriented 240x320 devices, .NET is meant as a general Windows CE derivates replacement (for example for embedded solutions in mobile phones - not smartphones but proprietary device types like Neonode N1) and CE 4.x is for HPC (Handheld PC) devices with landscape orientation with desktop-like look.

__________________
Zviratko

I'm a P800 switcher! :)