The Triplanetary Development Corporation was a business venture that was in operation in the mid-24th century.
Upon graduating from the University of Hurkos, Devinoni Ral was hired by this corporation as a staff researcher. He was later promoted to marketing director. After several years working for the corporation, Ral resigned to form his own business venture. The name of this corporation was mentioned in the biographical data file of Ral. (TNG: "The Price", okudagram)