First Direct Measurement of the Parity-Violating Coupling of
                             the Z0 to the s-Quark

We have made the first direct measurement of the parity-violating coupling of
the Z0 boson to the strange quark, A_s, using 550,000 e+e- -> Z0 -> hadrons
events produced with a polarized electron beam and recorded by the SLD
experiment.  Z0->s-sbar events were tagged by the absence of B or D hadrons and
the presence in each hemisphere of a high-momentum K+- or K0s.  From the
polar angle distributions of the strangeness-signed thrust axis, we obtained
A_s = 0.895+-0.066(stat.)+-0.063(syst.).  The analyzing power and u-ubar+d-dbar
background were estimated from the data.