Exlusive "or". Meaning one or
the other, but not both. In English, "or" is often meaning xor, and the
computer "or" (meaning one or the other or both) is and/or.
"xor" is used in most computer
syntax.
1: Chineese
XOR Pizza
2: if (x==1
xor y==1) then ...
(meaning If x
equals 1 or y equals 1 but not both, then ...