So, I'm up late, watching CSI...
 

and I wonder...

Why do they call it "G. S. W.'s"

Seems simpler to _say_ "Gun Shot Wounds"

"W" has too many damn syllables.

But they still say 'G. S. W.'s"

:ticking

After further thought, I gotta imagine it's because writing it as "G.S.W." is shorter... and, with the amount of writing that investigative/medical peeps do, they probably write it a lot more than they say it.... so they _say_ "G.S.W.'s" for uniformity.

But anyone know?

what about G.S.R ? ( gun shot residue)

Well, "G.S.R." is 'easier' to say than "gun shot residue" - so it's kinda the opposite situation.