A virus is a microscopic organism that can replicate only inside the cells of a host organism. Most viruses are so tiny they are only observable with at least a conventional optical microscope.
Recognized by the Guiness Book of World Records as the MMO with the longest play time per player, and easily the oldest game on this list (launching four years ahead of World of Warcraft, way back in 2001), Runescape deserves mention because it's one of the most updated and popular games of any kind on the planet.
Medical Mutual of Ohio. (Redirected from Medical Mutual) Medical Mutual of Ohio (MMOH) is an American mutual health insurance company. It is the oldest and largest health insurance company based in Cleveland, Ohio, and serves more than 1.6 million customers. Employing 2,500 people, Medical Mutual is one of the biggest employers in downtown Cleveland.