CERN
The European Laboratory for Particle Physics in Swizerland.
Tim Berners-Lee invented the World-Wide Web while working at CERN.
Other notable computing developments at CERN include ADAMO, Application Software Installation Server, CERNLIB, cfortran.h, CHEOPS, CICERO, Cortex, EMDIR, HBOOK, LIGHT, NFT, PATCHY, PL-11, Schoonschip, SHIFT, and ZEBRA.