The CERN main site: www.cern.ch
Facts, explanations, multimedia and background information for all audiences, including video.

The LHC home page: lhc.web.cern.ch/lhc
Information for technical and scientific audiences.

The Interactions LHC site: www.interactions.org/LHC
Explanatory material and context for the general public.

The USLHC site: www.uslhc.us/What_is_the_LHC
A compendium of information on the project for all audiences.