Searches at existing machines

This talk summarizes 20 presentations given in Parallel Session 10. They concern the results of searches performed in fixed target experiments (KTeV, NA48, ...) and mostly in the three major collider programs: proton-antiproton collisions at the Tevatron Collider (CDF, D0), positron-proton collisions at HERA (H1, ZEUS) and electron- positron collisions at LEP200 (Aleph, Delphi, L3, Opal). No discovery is reported, but a set of important limits on new objects and phenomena are presented. (51 refs).