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Where would we be without digital storage we'd be stuck in traffic trying to take our film to get developed at the drugstore and might even still be using scrolls or something but believe it or not the long Odyssey from the era before electricity to storing terabytes of information on pint-sized SSDs actually begins with paper specifically it began with punch cards which were quite important way before the year 2000 when the state of Florida suddenly decided that poking holes in a piece of paper was too difficult for whatever reason in fact punch cards and punch tape go all the way back to the early 1700 s when they were used in looms to weave textile patterns on tape could correspond to machine instructions as they did in things like player pianos or to numbers and characters as they did in things like early computers' tabulation machines from the late 1800s use punched tape to help count large data sets including helping to finish the U.S. census way ahead of schedule in 1890 of course punch cards don't exactly hold a lot of data with a typical punch card holding less than a tenth of a kilobyte, so you'd need about 28 billion of them to match the capacity of a typical 2 terabyte modern hard drive as digital computing started becoming more popular magnetic storage came to dominate, but this doesn't mean that the hard drive was the direct successor to the punch card an early form of magnetic storage was drum memory large cylinders with the data written on the outside like modern hard drives drum memory had read/write heads, but these were stationary instead the drum spun around at high speeds while the head waited for the relevant piece of data to come around, although they could store a lot more data than old punch cards their capacity was still pretty tiny by modern standards only a few kilobytes each drum memory was actually quite popular until the 1950s but magnetic tape which was actually patented a few years prior to drum memory was far more enduring as tape drives are still widespread today for archival storage you can learn more about that here tape was and still is great for cheap data storage in bulk but with slow access times resulting from having to constantly wind the tape back and forth a quicker solution was needed as computers became more powerful work was done in the 1940s on using cathode ray tubes to store data the same type of tube you can find in old-school TVs by firing electrons to create patterns representing ones and zeros that would stick to the tube however core memory quickly became much more popular especially due to its lower cost for working memory which we today refer to as RAM unlike earlier forms of magnetic storage core memory didn't have any moving parts making it much quicker core memory worked by changing the magnetic polarity of small iron oxide loops which were woven together in fact core memory was often made by hand by garment workers, but the small capacities of core memory led to a development of a...
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