Studies of σ(e+e-→hadrons) at BABAR using Initial State Radiation

We present a review of BaBar results on e+e-→ hadrons using the initial state radiation technique. Cross sections over the √(s) range from threshold to 4-5 GeV, with very small point-to-point systematic errors, are presented for the π+π-π0, 2(π+π-), 2(K+K-), 3(π+π-), 2(π+π-)2π0, 2(π+π-)K+K-, and pp-bar final states. The preliminary results of e+e-→K+K-π+π- and e+e-→K+K-π0π0 cross sections are also presented