EXCH /eks'ch*/ or /eksch/ vt.
To exchange two things, each for the other; to swap places. If
you point to two people sitting down and say "Exch!", you are
asking them to trade places. EXCH, meaning EXCHange, was
originally the name of a PDP-10 instruction that exchanged the
contents of a register and a memory location. Many newer hackers
are probably thinking instead of the PostScript exchange operator (which is
usually written in lowercase).
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excl /eks'kl/ n.
Abbreviation for `exclamation point'. See bang, shriek, ASCII.