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EXCH
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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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