If you’ve ever clicked the little square “Save” button on your computer, you’ve used a relic of the past without even realising it. That tiny icon—a blue disk with a silver shutter—was once an ...

Do you know that funky-looking square icon you click at the top of your toolbar when you want to save a document? That's not some random hieroglyphic. That's a floppy disk, and it wasn't that long ago ...