Welcome to Time Machines, where we offer up a selection of mechanical oddities, milestone gadgets and unique inventions to test out your tech-history skills.
It bears a passing resemblance to the vinyl record, but this futuristic concept was envisioned as more than just sound on a platter. The recording method involved electron beams and lasers; the base material was a coated, transparent plastic disc; and you'd get both an eyeful and an earful from the end product. Its intended goal in the market may have initially flubbed, but its core design has been patently embedded into a variety of successful formats ever since. Take a spin past the break to find out more about this invention.