TSR, Inc., originally called Tactical Strategy Rules, Founded in 1973 by Gary Gygax and Dave Arneson when the two were looking for a company to publish their new gaming system, Dungeons & Dragons. Over the years, Tactical Strategy Rules became TSR Hobbies and later TSR, Inc, as the company continued to produce content for the Dungeons & Dragons gaming system. TSR also produced non-gaming material as well. TSR produced four magazines over its lifetime, including D&D supplemental magazines Dragon and Dungeon. The company also produced novels, board games, and comic books.