From Wikipedia, the free encyclopedia
The Microsoft .NET Compact Framework (.NET CF) is a version of the .NET Framework that is designed to run on Windows CE based mobile/embedded devices such as PDAs, mobile phones, factory controllers, set-top boxes, etc. The .NET Compact Framework uses some of the same class libraries as the full .NET Framework and also a few libraries designed specifically for mobile devices such as Windows CE
InputPanel. However, the libraries are not exact copies of the .NET Framework. The ones in the .NET Compact Framework are scaled down to take up less space.
the rest of the very short article:
http://en.wikipedia.org/wiki/.NET_Compact_Framework