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).
SEX /seks/
[Sun Users' Group & elsewhere] n. 1. Software
EXchange. A technique invented by the blue-green algae hundreds of
millions of years ago to speed up their evolution, which had been
terribly slow up until then....