What's the rarest or most unusual computer-related item do you own?

[Mouse]

Well, after reading what other people have, my contribution seems
pretty piddly, but here it is.

The rarest hardware I have is probably a Sun SPARCstation Voyager or a
Tadpole 3GX - I'm not sure which is rarer (and those are just my
perception of rarity, which could be wrong).  It's possible one of my
klunker peecees happens to be a particular rare model, but I'm not
aware of any, and unless there's something notable about it, that kind
of rarity is not interesting - to me, at least. :-)

The rarest software I have is, of course, software that nobody else has
a copy of (given how much software I've written, there's a fair bit
nobody else has, because it's too new or because I haven't bothered to
export it or because nobody has cared to pick up a copy).  But I doubt
that's what the question was really asking for.  My open-source
fanaticism means I don't have very much that would be of interest here,
sorry.

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