Why are @ and " sometimes cross wired on some computers?

Question

Why are @ and " sometimes cross wired on some computers?

Answer 1

certification-

http://ccnatutorial.info/

Answer 2

Its to do with keyboard mapping.

Some countries have the Shift 2 character mapped as ", some as @.

This is normally set in the autoexec.bat file in DOS to set the correct keyboard layout i.e UK 101 or similar.

# is often another one crossed around so it can get confusing if the mapping is incorrect.