What's the rarest or most unusual software item do you own?

[Al Kossow]

On 1/11/17 11:02 PM, Lars Brinkhoff wrote:
> What about software?
> 

tough one.. I've worked on recovering a lot of rare stuff.
Probably the copy of the University of Hawaii BCC-500 backup tapes, since there was only ever one BCC-500

At CHM, probably the Whirlwind paper and magnetic tapes, or the TX-0 paper tapes, or the MIT PDP-1X
tapes, or ....