
I'm also regularly confused by the naming of the two slash marks available on the standard keyboard.
Microsoft terminology has (\) as a "backslash", but I've also read that the "normal" slash (/) is called the backslash because it was drawn by drawing back and down. In regular usage, it is the "forward" slash common in dates, fractions and the addresses of the Internet. The word "slash" by itself seems to refer to the (/).
Then, too, there was Zorro of my childhood TV watching. He slashed the Z diagonal top right to bottom left, too.
Slash, bash, hash, slosh...smash, crash! ( Good glyph, what was that? Sound of my brain running into something solidus ( ⁄ ), hitting the limit of this comment which is just my personal slant on the issue and done in my spare time, when not bowling.)
I just checked, and we have Bob Bemer to thank for the computer use of the backslash. Just ASCII and the Internet will answer.