Vint,
All of those are ok with me.
Collision with other three letter acronyms is inevitable. Staying
away from Committed Information Rate (CIR) wouldn't be my first
concern, but perhaps it's indicative of where you've been spending
your time :-) More seriously, the birthday problem statistics for
three letter acronyms predicts a collision with a population of about
156 TLAs, assuming all choices are equally probable. In the actual
population of TLAs, I'm sure the 50% point is reached at far fewer
than 150. I've become fond of four letter acronyms in order to
distinguish them. The 50% point for four letter acronyms is 796.
Steve