It's the buggy BETA version.
The Big Bang Theory Season 2, Episode 20
You mean like a BETA test?
The Big Bang Theory Season 5, Episode 14
Look at the BETA function
of quantum chromodynamics.
The Big Bang Theory Season 1, Episode 5
A BETA test requires people
that weren't involved
The Big Bang Theory Season 5, Episode 14
And as the first BETA testers,
you two have quite the edge...
The Big Bang Theory Season 3, Episode 7