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Widely regarded as the first electronic device, the relay was a remote switch controlled by electricity. -
The telegraph, invented by Samuel Morse, enabled long distance communication for the first time and was used throughout the turn of the century. -
Circuit boards are vital in more complex electrical technology, and were invented by Paul Eisler in the 1890s. -
Though it had been theorized for several years before 1895, that is when the first working radio was built by Guglilmo Marconi. -
Concepted in 1837 by Charles Babbage, Henry Babbage built a portion of the first computer. -
In the 1920s, radio inspired on air classes, allowed students to learn remotely. -
The first projector was invented in 1965 by David Hansen. Although the digital design of today is credited to Gene Dolgoff. -
The overhead projector was invented in the early 1960s and was first used in classrooms in the 1970s and saw frequent used through the 1990s. -
