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In line with the recent posts about Vintage calculator museum and museum of Soviet calculators, here is a link to Obsolete Comptuer Museum. The older you are, the harder will be that nostalgy feeling in your heart.
Lots of pictures, information, links, etc. There are also forums to unleash your thoughts.
Update: There is also another one – Old-Computers.Com. Some entries here have much more information about the hardware, history, uses, and the like.