When was dungeons and dragons first established, and by who, how has it changed since?

answer:

dungeons & dragons (commonly abbreviated as d& d or dnd)[2] is a fantasy tabletop role-playing game (rpg) originally designed by gary gygax and dave arneson.[3] it was first published in 1974 by tactical studies rules, inc. (tsr). the game has been published by wizards of the coast (now a subsidiary of hasbro) since 1997. it was derived from miniature wargames, with a variation of the 1971 game chainmail serving as the initial rule system.[4] d& d's publication is commonly recognized as the beginning of modern role-playing games and the role-playing game industry.[5]

explanation:

the answer is use of support  

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