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The first known mentions in texts of various things:

First mention of tofu (in Japan): 1183
First mention of the dry fishing fly: 1853
First mention of the metal platinum: 1557
First mention of olive oil as a sexual accessory: 350BC
First mention of spectacles being worn (in Italy): 1289
First mention of backgammon (in the Codex Exoniensis):1125
First mention of handguns: 1326
First mention of playing cards in Europe: c1275
First mention of the River Mersey: 1007
First mention of soy beans being eaten in America: 1855
First mention of a fountain pen (by Samuel Pepys): 1663
First mention of Robin Hood: 1377
First mention of Microsoft Windows on the Usenet: November 1983
First mention of guilds for dyers in London: 1188
First mention of a banjo: 1678
First mention of parachutes (used by Chinese acrobats) :c1100
First mention of what became known as AIDS: June 1981
First mention of rat traps (in the medieval romance Yvain): c1170
First mention of metal skates: 1400
First mention of the sun's corona (by Byzantine historian Leo Diaconus): 968
First mention of the term search engine: March 1988
First mention of martial arts in China: 2674BC