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This paper presents a basic overview of the historical development of electronic tachymeters, through solutions developed by the German manufacturer Zeiss. This factory is responsible for the first instrument of its kind in the world, which is described with special attention. Subsequently, the possibilities of different tachymeters are illustrated in chronological order, over their three decades of evolution. Finally, an overview on the current state of development and production of Zeiss tachymeters is given, since the plant became an integral part of Trimble's large concern. [ABSTRACT FROM AUTHOR]