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Fun fact, Nebraska Furniture Mart holds 0x0004 on the list of Linux Manufacturer USB Ids [1]. At my last job we built a product with a custom OpenWRT fork, and I needed to identify an Atmel D21 behind a usb hub on a custom board we built, and I figured I'd never have a collision with any NFM hardware, so I just used that since no one outside our company would never see the device either.

[1] http://www.linux-usb.org/usb.ids

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Those aren't Linux IDs, those are USB-IF issued vendor IDs. That list is merely maintained by a Linux dev. That number is so low I wonder why NFM registered it. They have retailed electronics and accessories. Possibly some USB peripheral in the 90s?

Well, sort of. They're Linux's interpretation of a superset of VID/PID combinations recognized by the USB-IF. The USB-IF doesn't allow product IDs to be resold, as was (and still is) done by MCS in the $16D0 VID range, or to party on abandoned/unused IDs like C&T's at $420, as something called the "Celly SIM Card Reader" seems to be doing.

Linux is under no obligation to follow the (absurd) policies of USB-IF, so they basically have to maintain their own parallel list.

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