  The experimental status of stable bound states made out of heavy quarks is
reviewed. The need for a way to deal with the non-perturbative transitions
involved calls for precision measurements on one hand, and for discovery of as
yet undetected states to confirm predictions on the other. In this article,
recent experimental contributions to heavy quarkonia spectroscopy and decay
will be reviewed, mostly from data analyzed by the BES and CLEO collaborations.
  The most dramatic recent discoveries include the detection of the first
stable L=2 state, and a first non-pionic hadronic transition in the Upsilon
system, and a first measurement of chi_cJ --> Lambda Lambdabar. Scans of the
psi' and Upsilon(1,2,3S) resonances are used to add information on partial and
total decay widths.
