Charles Babbage's Difference Engine
The Difference Engine was an accurate mechanical calculator designed by Charles Babbage in the 1840s, but was never built in its inventor's lifetime. Here, its modern builder explains how it works.
MITS Altair 680 For Sale on eBay
Here is something you don't see to often a MITS Altair 680 For Sale on eBay. This is not worth as much a MITS Altair 8800, but its worth a look. Here is an excerpt from the auction: "here is a neat vintage computer up for auction. you dont see many of these for sale and its in pretty nice condition too! this was from an estate and i am almost positive he was the original owner. i have powered it up and it seems to work (i was told that it did). all i have is the computer itself - i didnt get any documentation or software with it, sorry, but there is a lot of information about these on the net if you google it. you can get all the documentation and schematics and user manuals on the net. i got this with an mits imsai which i am going to auction later too. this thing has been sitting in a box put away for ages so i am unsure of its electrical condition, so it is sold as is, but i did have it powered up for quite awhile. winning bidder pays shipping cost and please be in touch
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