Sim

Simulation (or Sim) is often refered to a method of play within a collaborative narrative wherein each writer plays a number of characters within a construct of a world or universe.  This is generally refered to as Role Playing Games (RPGs).  Simming (the act of playing in a Role Playing Game) favors many flavors of play including live chat, email, message board, or general play by post, often using "Tagging," methods to associate turns placed on characters and interactions between.  Star Trek Eternity has spawned a universe wherein a multiple of sims exsist either within the same timeline or on different points.