Alpha(S) Measurements From Cleo

Measurements of the strong coupling constant, alpha(s), by the CLEO Collaboration are reported. The most recent measurement of alpha(s) was obtained from a simultaneous fit to R(tau), the ratio of the hadronic over the leptonic decay widths of the tau lepton, and to D-tau(kl), the spectral moments calculated from the hadronic decays of the tau. CLEO's first determination of alpha(s) from a jet rate rate analysis in the four-flavor continuum is also reviewed. Two other determinations of alpha(s) are in progress: one extracts alpha s from the number of direct photons produced in the decay of the Upsilon(1S), and the other extracts alpha(s) from the two-photon width of the eta(c). AU measurements are consistent with the 1994 Particle Data Group world average of alpha(s)(M(Z0)) = 0.117 +/- 0.005 when evolved to the Z(0) mass.