MMO stands for "massively multiplayer online" game. It is a type of video game that allows a large number of players to interact simultaneously in a virtual world. MMOs usually feature a huge, persistent open world, although there are games that differ. These games can be found for most network-capable platforms, including the personal computer, video game console, or smartphones and other mobile devices. MMOs can enable players to cooperate and compete with each other on a large scale, and sometimes to interact meaningfully with people around the world. They include a variety of gameplay types, representing many video game genres. MMORPG means "massively multiplayer online role-playing game". It is a type of MMO that allows players to take on a character and interact with other players in a story-driven environment. Other types of MMOs include MMOFPS (massively multiplayer online first-person shooter) and MMORTS (massively multiplayer online real-time strategy) games.