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I'm pretty sure some Apple USB had a notch. But I think it wasn't to help to plug it in, I think it was to ensure it was directly plugged into the computer with

by kuon 7y ago

I'm pretty sure some Apple USB had a notch. But I think it wasn't to help to plug it in, I think it was to ensure it was directly plugged into the computer without using a cable extension. But I don't remember well, it's only speculations.

lonelappde 7y ago
You got it backwards. The notch was for compatibility with the extension cable, which had a lug because USB extension cables are not allowed by the spec (too much distance for the signal), so the lug prevented you from using the extension cable with a device that might fail.
- lilyball 7y ago
  Also this way you can't plug two extension cables into each other, because the cable didn't have the notch, only the lug.
- kuon 7y ago
  You are right, it was on the extension cable!