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Babbage later designed a simpler and even more clever "Difference Engine Number 2", that was also not completed in his lifetime.  But in 1991, the bicentennial of Babbage's birth, this computer was built in the British Science Museum, from Babbage's original plans.  It operates flawlessly, though a few billion times more slowly than modern electronic computers.  It is operated by turning a crank.

Babbage later designed a simpler and even more clever "Difference Engine Number 2", that was also not completed in his lifetime.  But in 1991, the bicentennial of Babbage's birth, this computer was built in the British Science Museum, from Babbage's original plans.  It operates flawlessly, though a few billion times more slowly than modern electronic computers.  It is operated by turning a crank.

[[File:SSEM Replica.jpg|thumb|left|The Manchester Small-Scale Experimental Machine is considered  the world's first stored-program computer, 1948.]]

[[File:SSEM Replica.jpg|thumb|left|The Manchester Small-Scale Experimental Machine is considered  the world's first stored-program computer, 1948.]]

The first computer comparable to the modern day computer, an electronic calculation machine, was the [[ENIAC]]. Built as a artillery support machine, it was unveiled in early 1946.<ref>http://ftp.arl.army.mil/~mike/comphist/</ref>

The first computer comparable to the modern day computer, an electronic calculation machine, was the [[ENIAC]]. Built as an artillery support machine, it was unveiled in early 1946.<ref>http://ftp.arl.army.mil/~mike/comphist/</ref>

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==Classifications==

==Classifications==