Hitachi has come up with an incorruptible system that may allow data to last forever. Data is stored forming microscopic dots serving as binary codes within a piece of quartz glass. This should be easily readable using an optical microscope. Only thing being, several hundred years from now, the concept of binary code should still be understood to whoever is around then. The prototype developed by Hitachi is two centimeters (0.8 inches) square by two millimeters thick, incorporating four layers of dots. As of now, the memory capacity is40 megabytes per square inch, roughly equal to that of a music CD. The glass square is expected to withstand exposure to high-temperature flames and various harsh chemicals, and survived being heated to 1,000º C (1,832º F) for two hours. It is also unaffected by radio waves or immersion in water. Though glass is breakable, quartz is known for being particularly hard.