version or V2.0
The specific release of a software or hardware product, usually designated by a number. You may see a version number abbreviated as V2.0, for example, to indicate the second version. If you see V2.5, the software may be a beta version that's been released for testing prior to V3.0. There is a general consensus that programs aren't quite right until the third release.
NetLingo Classification: Technical Terms
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