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Pagers were originally designed and built in the 1950's but they didn't really take hold in terms of popularity until the 1980's.
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The overhead projector was a simple system for projecting images, text and drawings onto a screen.
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The predecessor of the modern mobile phone, the personal digital assistant offered limited access to a lot of modern capabilities including internet access, word processing, touchscreen functionality and more. They quickly became obsolete when smartphones started to gain popularity, but before that time they were a favorite with businessmen across the world.
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Floppy disks were a type of data storage that originally appeared in the 1970s. These drives were obsolete by the 1990's.
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In February 1878, the phone book was cutting-edge technology.
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The wired telephone dates back as far as 1844 and it has seen many iterations over the years that have since passed.
