Some known Operating System resources!

The followings are some good Operating System resources:

A dedicated OS search engine:

http://aiurlano.netsons.org/osdev/

The Operating System Resources Centre: http://www.nondot.org/sabre/os/articles

BonaFide OS development news and tutorials:

http://www.osdever.net

Linux from Scratch and beyond:

http://www.linuxfromscratch.org

The Linux Documentation Project:

http://tldp.org/