OF e + e - REACTIONS IN THE ENERGY RANGE 3 TO 9 GeV

There are three principal subjects explored by e+eannihilations in the DORIS I/SPEAR energy range: jets, the T lepton and charm. The subtle indication of jets at these low energies can now be contrasted with the visually-striking PETRA data, which has provided new insights into the jet characteristics Accordingly, my discussion will be limited to the r and charm. As we shall see, our relative understanding of these subjects has essentially reversed since the VIII Lepton Photon Symposium at Hamburg. The general properties of the r and most of its decay modes have now been measured fairly precisely and found to agree with the "standard model", whereas the charmed particles have recently provided some unexpected results.