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This special issue was edited by Joachim Vogt and Nina Gerber on the occasion of the 100th anniversary of the foundation of the Psychotechnik Institut at The Applied University of Technology in Darmstadt, Germany 1922. The institute was closed shortly after but the work continues in Darmstadt’s Institute of Ergonomics and Human Factors as well as Work and Engineering Psychology Research Group. We are proud to present a lot of high quality, state of the art, interdisciplinary research of psychologists and engineers, many of them with roots in Darmstadt. We open with two editorial articles. This first one by Vogt et al. describes how the field developed from experimental psychology and spread into many application fields. The second by Gerber et al. will build bridges to the following articles coming from colleagues all over Europe. We hope that this is a valuable contribution to the history and further development of our field.