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