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EXCH: /eksīch@/, /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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