Answer: tsr

AnswerCrossword Clue
TSR

Co. that introduced Dungeons and Dragons

TSR

RAM computer program

TSR

Early role-playing game co.

TSR
Shipping abbr.
TSR
Co. purchased by Wizards of the Coast
TSRClassic fantasy game co.
TSRCompany started by the late Gary Gygax
TSRProgram that stays in RAM