  The ISR method has been largely exploited by the BABAR experiment, for
measuring numerous channels of the cross section e+e- into hadrons. For the
pi+pi-(gamma) and K+K-(gamma) channels, BABAR has pioneered the method based on
the ratio between the hadronic mass spectra and the mu+mu-(gamma) one. This
method allows to cancel many systematic uncertainties in the ratio, hence the
precise measured cross sections. Many multihadronic channels have also been
studied using the ISR method, and cross sections have been published. These
experimental results have also been exploited for phenomenological studies,
like the determination of the hadronic contribution to the anomalous magnetic
moment of the muon (g-2)_mu.
