Although much new data has become available since 1986, three new results dominate the analysis: a value of the Planck constant obtained from a realization of the watt a value of the fine-structure constant obtained from the magnetic moment anomaly of the electron and a value of the molar gas constant obtained from the speed of sound in argon. However, the changes in the values themselves are less than twice the 1986 assigned one-standard-deviation uncertainties and thus are not highly significant. In general, the new results lead to values of the constants with uncertainties 5 to 7 times smaller than the uncertainties assigned the 1986 values. We summarize the principal advances made in the fundamental physical constants field since the completion of the 1986 CODATA least-squares adjustment of the constants and discuss their implications for both the 1986 set of recommended values and the next least-squares adjustment. Recommended Values of the Fundamental Physical Constants: A Status Report
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