The history of the sign boards dates back to the late 1920's when they were officially known as motographs, a news bulletin service. It was also called a zipper but no one really knows why. Reader boards were first used in the New York Times building and the first message announced results of the Hoover vs. Smith presidential election.
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Signs became popular very quickly and people would go to the New York Times building just to see the messages displayed on the reader boards. After a while many other lifetime clinic västerås businesses started using reader boards: gas stations used them to show the time or temperature; retail stores promoted products, etc.
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Nowadays,sign boards are used in just about every city in the USA. In indoors environments, they are used in schools, churches, hospitals, office directories, markets, arenas, and movie theaters.
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The first sign boards allowed only small messages to be displayed. Nowadays, it is possible to write messages on many lines and on varying sizes of electronic sign. You can also change the real time message any time you want. New technologies also allow it to display graphics and videos.