Do you mean the extension cable that came with the original Apple USB keyboard? It was only for the extension cable -- which are prohibited by the USB spec, so

Do you mean the extension cable that came with the original Apple USB keyboard? It was only for the extension cable -- which are prohibited by the USB spec, so it was technically a "captive" extension. (The USB specs define captive as having a non-standard-USB plug, even if it's not physically captive.) Blame the USB spec, not Apple. They're actually the only company I've ever seen make an extension cable that meets the letter of the spec.