time line of 1900's By 06257.casp Jan 1, 1901 vacumm cleaner Jan 1, 1902 air conditioning; automated tea maker Jan 1, 1903 electrocardiogram; first powered flight Jan 1, 1904 radar; tea bags Jan 1, 1905 plastic Jan 1, 1906 radio broadcasting Jan 1, 1907 electric washing machine Jan 1, 1908 coffee filter; water coolers; paper cups Jan 1, 1913 crossword puzzles; bras; zips Jan 1, 1916 sonar Jan 1, 1920 hair dryers; kiss-proof lipstick Jan 1, 1924 robots; insulin Jan 1, 1925 frozen food Jan 1, 1926 aerosol sprays Jan 1, 1927 Talkies’ at the movies Jan 1, 1928 penicillin Jan 1, 1930 : jet engine; mechanical toothbrushes; Scotch tape Jan 1, 1932 parking meter Jan 1, 1935 electric guitar Jan 1, 1936 sun tan lotion; electric blanket Jan 1, 1938 ballpoint pen; photocopying Jan 1, 1939 helicopters Jan 1, 1942 first nuclear reactor built; Jan 1, 1946 microwave ovens; automation; Bikini; Tupperware; Tupperware Parties Jan 1, 1947 transistors; holograms; mobile phones Jan 1, 1948 frisbees; velcro; general purpose computers; contact lenses Jan 1, 1950 credit cards Jan 1, 1951 Tetrapak cartons of milk Jan 1, 1952 wide-screen cinema Jan 1, 1953 wide-screen cinema Jan 1, 1954 wide-screen cinema Jan 1, 1955 wide-screen cinema Jan 1, 1956 video tape recorder Jan 1, 1957 video tape recorder Jan 1, 1958 video games; modems Jan 1, 1959 car seat belts Jan 1, 1960 cardiac pacemaker; laser Jan 1, 1961 Man in Space Jan 1, 1964 Man in Space Jan 1, 1965 optical disc; bay buggy; HTML Jan 1, 1966 pocket television Jan 1, 1967 portable calculator Jan 1, 1968 portable calculator Jan 1, 1969 the Internet; cash dispenser Jan 1, 1970 LED and LCD’s Jan 1, 1971 floppy disc Jan 1, 1973 barcodes; post-it-note; car airbags Jan 1, 1975 personal computer; laser printer Jan 1, 1977 MRI scanner; inkjet printer Jan 1, 1979 first personal stereo Jan 1, 1980 Hepatitis B vaccine Jan 1, 1987 disposable contact lenses Jan 1, 1989 World Wide Web