Expansion Slots and Ports - 1194.26(d)
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When providing at least one type of expansion slot, port, and connectors shall comply with publicly available industry standards. This was to try to avoid the situation, we've seen it sometimes, it's not as popular right now, but it certainly could come back. Where products have very specific connectors so that you can only use their keyboard and you can't use any specialized keyboard to accommodate somebody. We used to see this with special types of serial ports back in the eighties. I haven't seen a serial port in a while, so I guess we don't have to worry about that one. In general, this is saying, you can have any proprietary card or port that you want, like for a keyboard, but if you do that, if you provide a proprietary keyboard, then you need to provide an alternative standard keyboard, ps/2 for instance. That's what we're talking about by meets publicly available standards, that everybody knows how to write to it, rather its centronics, r s 2 3 2, ps/2, or whatever.