A frontier in fast computing

The primary mission of particle physics is fundamental science. Big apparatus is required however to do such science: accelerators, detectors, and computing. Also the methodology used forms a trinity: experiment, theory, and simulation. This talk has a focus on computing and simulation. The worldwide Grid computing allows us to analyze all data within days after they are recorded at the experiment and to get to physics results quickly, as in the case of the recently discovered Higgs-like boson at 126 GeV mass. Developments in simulation, computing, accelerators and detectors all provided valuable technical results to society, e.g. the WWW, hadron therapy and medical imaging. The technology aspect and the fundamental science aspect of particle physics, and of other fields of physics, are both important for the role of science in the third millenium.