CERN, the particle physics laboratory at Geneva, is governed by 25 Member States with 11 Associated Members
Background
CERN describes its work as uncovering what the universe is made of and how it works, by providing a unique range of particle accelerator facilities to researchers.
The Laboratory was established in 1954 and has become a prime example of international collaboration.
It is governed by 25 Member States together with 11 Associated Member States.
Its postal address is at 1211 Geneva 23 in Switzerland.
Among its stated aims are using its flagship accelerator, the LHC, to its maximum potential during the high-luminosity phase, and preparing for a post-LHC high-energy accelerator project.
Its facilities include the CERN accelerator complex, the HiLumi LHC upgrade and the Worldwide LHC Computing Grid.
In plain words
LHC Large Hadron Collider — CERN's flagship accelerator, now being used in its high-luminosity phase.
WLCG Worldwide LHC Computing Grid — The distributed computing system that handles LHC experiment data.