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    22 Ways To Know You Were A 20th Century Kid

    If this stuff looks familiar, you were definitely born after 1900!

    1. You've experienced air conditioning.

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    1902: The first modern electrical air conditioning unit was invented by Willis Haviland Carrier in Buffalo, New York.

    2. You've colored with a crayon.

    1903: Crayola brand crayons made their debut in 1903. The crayons were sold for five cents and the colors were black, brown, blue, red, purple, orange, yellow, and green.

    3. You've washed your clothes in an electric washing machine.

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    1904: Electric washing machines were first mentioned in newspapers.

    4. You have listened to a person speak on the radio.

    1906: Reginald Fessenden used a rotary-spark transmitter to broadcast the first radio program from Ocean Bluff-Brant Rock, Mass., on Christmas Eve. He played "O Holy Night" on violin and read a passage from the bible.

    5. You've cleaned a room with a motorized vacuum cleaner.

    1907: A janitor from Canton, Ohio named James Murray Spangler invented the first portable vacuum cleaner. He didn't have the funding to produce the design himself, so he sold the parent to William Henry Hoover in 1908.

    6. You've been on or heard of someone who's been on Ecstasy.

    1912: MDMA was first synthesized by Merck chemist Anton Köllisch, in an effort to develop a substance that would stop abnormal bleeding. It's effects were described in a paper in 1958, and by the '70s MDMA, or ecstasy, was being used recreationally.

    7. You have zipped or unzipped something.

    1913: Gideon Sundbäck, a Swedish-American electrical engineer, devoted himself to design after his wife's death in 1911, and by December of 1913 he had invented the modern zipper. In 1923, the popular "zipper" name came from the B. F. Goodrich Company, who used the fastener on a pair of rubber boots and referred to it as a "zipper." The name stuck.

    8. You've worn or seen a bra that looks more or less like this

    1914: The modern brassiere (bra) design was patented by Mary Phelps Jacob.

    9. You've heard people talking in a movie.

    1923: After years of experimentation, the first commercial screening of short motion pictures using the technology took place. By 1927, a feature film "talkie" called The Jazz Singer is presented. Sound-on-film would soon become the standard.

    10. You have seen any TV show.

    1928: The first television station broadcast from the General Electric factory in Schenectady, NY. Their primary broadcast was a Felix the Cat doll rotating on a turntable, which aired for 2 hours every day.

    11. You've eaten perfectly sliced bread without having to get out a knife.

    1928: Sliced and packaged bread made with an automated machine was first sold by the Chillicothe Baking Company of Chillicothe, Missouri. The bread was advertised as "the greatest forward step in the baking industry since bread was wrapped."

    12. You've kept food in the freezer.

    1929: Clarence Birdseye began selling his quick-frozen foods, after getting the idea from seeing natives in Labrador using natural freezing to preserve meat.

    13. You've eaten a chocolate chip cookie.

    1930: Ruth Graves Wakefield, the owner of Toll Hose Inn in Whitman, Mass., accidentally developed the chocolate chip cookie.

    14. You've sipped from a can of Diet Coke.

    1935: Beverages are canned for the first time. In 1982, Diet Coke became the first new brand since 1886 to use the Coca-Cola trademark.

    15. You've played with a slinky.

    1945: Slinkies were invented by Richard James in the early 1940s, and first sold at the Gimbels department store in Philadelphia, Pennsylvania. The toy sold its entire inventory of 400 units in ninety minutes.

    16. You've seen a girl in a bikini.

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    1946: The modern bikini was introduced and named after Bikini Atoll, an island where the atomic bomb was being tested.

    17. You've used a microwave.

    1947: The first microwave over, the "Radarange," is sold after Percy Spencer invents it using radar technology developed during the war. In 1967, a countertop version is introduced.

    18. You've fastened something with velcro.

    1948: A hook and loop fastener is invented by George de Mestral, who patented the new-fangled "velcro" in 1955, commercially introducing it in the late '50s.

    19. You have played a video game.

    1948: The first known interactive electronic game was by Thomas T. Goldsmith Jr. and Estle Ray Mann on an "amusement device" on a cathode ray tube. The game was a missile simulator, inspired by World War II. It took until 1971 for the first video game to be commercially sold.

    20. You've "charged it."

    1950: Ralph Schneider and Frank McNamara founded the Diners Club, the first "credit card" with which customers could pay multiple merchants with one card. Their general purpose charge card was followed by American Express in 1958, the first to create a worldwide credit card network.

    21. You've used a personal computer.

    1957: IBM announced the IBM 610 Auto-Point, almost ten years in the making, at the Watson Lab at Columbia University. According to Columbia University, the IBM 610 was the first personal computer because it was "the first programmable computer intended for use by one person and controlled from a keyboard."

    22. You've played with a Barbie.

    1959: Barbie is launched after Mattel co-founder Eliot Handler's wife Ruth had the idea, inspired by her daughter Barbara's love of paper dolls and by a German toy doll with adult proportions called Bild Lilli. Barbie (named for Barbara) made her debut at the American International Toy Fair in New York on March 9, 1959.

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