  The Muon g-2 collaboration has measured the anomalous magnetic g value, a =
(g-2)/2, of the positive muon with an unprecedented uncertainty of 0.7 parts
per million. The result, based on data collected in the year 2000 at Brookhaven
National Laboratory, is in good agreement with the preceding data. The
measurement tests standard model theory, which at the level of the current
experimental uncertainty involves quantum electrodynamics, quantum
chromodynamics, and electroweak interaction in a significant way.
