from
Jargon File (4.4.4, 14 Aug 2003)
EXCH
/eks'ch@/, /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).
from
The Free On-line Dictionary of Computing (8 July 2008)
EXCH
<jargon> /eks'ch*/ or /eksch/ 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).
[{Jargon File}]
(1999-09-17)