<a href="https://en.wikipedia.org/wiki/Charles_Babbage" id="mwig" rel="mw:WikiLink" title="Charles Babbage">Charles Babbage</a> proposes a <a href="https://en.wikipedia.org/wiki/Difference_engine" id="mwiw" rel="mw:WikiLink" title="Difference engine">difference engine</a> in a paper to the <a href="https://en.wikipedia.org/wiki/Royal_Astronomical_Society" id="mwjA" rel="mw:WikiLink" title="Royal Astronomical Society">Royal Astronomical Society</a>.