Call it by its name. That typographic slice, the pair of words coming after “http colon” in a web address? It’s a “slash”. Some people call it a “forward slash” because it leans forward, to the right. What it’s not is a “backslash”. This is a backslash: \. Notice how it leans back, to the left. Stop calling this / a backslash. Call it a virgule, a stroke, a slash. Heck, call it a solidus if you must, but please, don’t call it a backslash. It’s not a backslash.