YO-YO - The yo-yo is one of the oldest toys. Yo-yo's have been used as a toy for over 2,500 years, when the ancient Romans played with wooden and metal yo-yo's. The word "yo-yo" may come from Tagalog language (the language of the Philippines), meaning "to come back."
ZIPPER - Whitcomb L. Judson was an American engineer from Chicago, Illinois, who invented the zipper. Judson patented his "clasp-locker'' on Aug. 29, 1893; later in 1893, he exhibited this new invention at the Chicago World's Fair. He and Lewis Walker founded the Universal Fastener Company to manufacture these fasteners. They never succeeded in selling Judson's new device. Judson died in 1909, before his device became commonly used and well known. The zipper was improved in 1913 by the Swedish-American engineer, Gideon Sundbach (a former employee of Judson). Sundbach was successful at selling his invention, which he called the "Hookless 2." He sold these fasteners to the US Army, who put zippers on soldiers' clothing and gear during World War I.
- The word zipper was coined by B.F. Goodrich in 1923, whose company sold rubber galoshes equipped with zippers. Goodrich is said to have named them zippers because he liked the zipping sound they made when opened and closed.
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