different trados versions running in one environment

Hi All, is possible to run different trados studio version in one environment? E.g. if I install Trados Studio 2015 in Windows 10 OS - suppose it is activating and using license server. I will also install Trados Studio 2021. Is it possible to run both Trados versions? Or only one in time, but both can be installed? Or only one version can live in one OS?

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