&gt; it&#x27;s not THE Difference Engine<p>Couldn&#x27;t be, Babbage never finished it, switched to the Analytical Engine (burning his government funding bridges) and never finished that either.<p>The subject of the article also isn&#x27;t the original <i>design</i>, they&#x27;re the No. 2 design following lessons learned working on the Analytical Engine.<p>Of note: on top of the two Difference Engines, the Science Museum built the printer which Babbage had designed for the Engine. Babbage had realised that many table errors came from typesetting transcription errors, so the printer was designed to produce stereotype plates, templates for mass-printing with limited room for human error.<p>Also contrary to what the article seems to say, Myhrvold didn&#x27;t fund the first DE reconstruction. He commissioned one, and part of that commission was used to build the printer.