The main site at Meyrin also has a large computer centre containing very powerful data processing facilities primarily for experimental data analysis, and because of the need to make them available to researchers elsewhere, has historically been (and continues to be) a major wide area networking hub.
The smaller accelerators are located on the main Meyrin site (also known as the West Area), which was originally built in Switzerland alongside the French border but has been extended to span the border since 1965.
For example, NA32 was an experiment looking at the production of charmed particles and located at the Prévessin (North Area) site while WA22 used the BEBC bubble chamber at the Meyrin (West Area) site to examine neutrino interactions.
Its main function is to provide the particle accelerators needed for high energy physics research and numerous experiments have been constructed at CERN by international collaborations to make use of them.
There is also the Antiproton Decelerator (AD), which reduces the speed of antiprotons (which are created travelling at nearly the speed of light) for research into antimatter.
The smaller accelerators are located on the main Meyrin site (also known as the West Area), which was originally built in Switzerland alongside the French border but has since been extended to span the border.