Pot . . . kettle . . . mantissa, sign, exponentUS keyboards are not standard, so don't go assuming everyone has a similar keyboard.
Most newer laptops have two backslash keys, which I suppose are easier to reach: one next to the left shift key and one above the right one. I find I tend to hit them by accident, however.It's a US IBM keyboard. The "\" and "|" characters are on the same key, just under the backspace key, which is not the easiest place to reach.