  This report sums up in two volumes the first 50 years of operation of the
CERN Proton Synchrotron. After an introduction on the genesis of the machine,
and a description of its magnet and powering systems, the first volume focuses
on some of the many innovations in accelerator physics and instrumentation that
it has pioneered, such as transition crossing, RF gymnastics, extractions,
phase space tomography, or transverse emittance measurement by wire scanners.
The second volume describes the other machines in the PS complex: the proton
linear accelerators, the PS Booster, the LEP pre-injector, the heavy-ion linac
and accumulator, and the antiproton rings.
