  Pulsars have now been studied for 34 years. We know of the existence of some
1500 objects at radio frequencies. Many of the characteristics of pulsars such
as pulsar period, period derivative, spectrum, polarization, etc., have been
catalogued for many objects. Still we do not know the details of the pulsar
emission mechanism. The present review will give an up-to-date description of
the characteristics of (normal, slow) radio pulsars. Millisecond pulsars will
be dealt with by M. Kramer (this volume).
