Kernel
is the central piece of any operating system
which is manages every aspect of a operating system.
So each operating systems like Unix
, Windows
have their own kernel
which makes it different form each other. Similarly, Windows CE
is different from your normal personal computer versions of operating system
Personal computing OS may include Windows 7
, Windows 8
, Windows XP
etc
But Windows CE
is not another version of the above mentioned Operating Systems, but a different one. This compact edition is specifically designed for a particular task may be like Car Computer, TV, etc..
By Trimmed down
it tries to convey you that this Kernel cannot help with all tasks that your desktop can do and also its size is possibly less than that of your normal desktop OS