> First thing that came to mind:
>=20
> http://en.wikipedia.org/wiki/Flip-disc_display
>=20
> I don't know where to source such a thing, or if they can be made
> persistent with a power off.

Yes they are persistent with power off, they require a magnetic pulse to fl=
ip them, and another magnetic pulse to flip them back.
--=20
Scanned by iCritical.

--=20
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