QCD Tests at $e^{+}{e}^{-}$ Colliders

Abstract

A short review of the history and a 'slide-show' of QCD tests in $e^{+}{e}^{-}$ annihilation is given. The world summary of measurements of ${\alpha }_s$ is updated.

Comments: Revised version: some references added and corrected; world summary of ${\alpha }_s$ extended by result from polarized structure functions. 9 pages, 15 EPS figures; contribution to the CQD Euroconference 97 (Montpellier 1997)