actually, we already have such a TLA
ABC
Atomic-Biological-Chemical. Been used in (West) Germany (where it translates into the same TLA...imagine that!) for at least 3 decades.
jb4
"Programming today is a race between software engineers striving to build bigger and better idiot-proof programs, and the Universe trying to produce bigger and better idiots. So far, the Universe is winning."
Rich Cook