
That is an integrated ion trap
and time-of-flight MASS spectrometer.
The Big Bang Theory Season 6, Episode 5

The guys here call me Mass.
The Big Bang Theory Season 5, Episode 15

Yes, assuming the hypothetical planet
has a MASS greater than the Earth.
The Big Bang Theory Season 1, Episode 13

I'm no longer obsessing
over why the predicted MASS...
The Big Bang Theory Season 4, Episode 7

'Cause force equals MASS
times acceleration.
The Big Bang Theory Season 5, Episode 15