English version

beta version

From Longman Dictionary of Contemporary Englishbeta versionˈbeta ˌversion noun [countable] technical  software that is being tested by people who will use it, to see if it works properlyalpha version
Examples from the Corpus
beta versionAs it's a beta version, it's tricky to give ClarisWorks a star rating.There was no manual with the beta version, but the package as a whole is a cinch to use.
From Longman Business Dictionarybeta versionˈbeta ˌversionCOMPUTING a VERSION of software that has been tested by the people who developed it and then given to a specially chosen group of users to find out if there are any more small problems with it, before it is made available to the publicEven with this beta version, no major problems have surfaced, so we expect the release version to be very solid. version
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