The “Save” icon is a floppy disk most users have never touched.

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Floppy disks faded out in the 2000s, but the 3.5-inch disk survives as the universal symbol for saving a file.

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The “Enter” and “Return” keys were once different things.The Shift key once physically shifted the type mechanism.<span class="aj-year">1865</span>Nokia started as a paper mill.