Experimental particle physics strongly is centralised in a few big accelerator labs (CERN, Fermilab, DESY, SLAC, KEK). Increasingly concentrating on few very big projects: CERN: LHC (4 experiments, under construction), Fermilab: Tevatron (2 experiments), DESY: HERA (4 experiments) (until end-2006?) SLAC: PEP-II (BaBar) and KEK: KEK-B (BELLE).