Terminal transparent display language (TTDL)
Carl E. Krebs, C. Bumgardner, T. Northwood · 1976
Terminal Transparent Display Language (TTDL) is a software language that implements complete and effective communications in an on-line computer system containing two or more different types of terminals. TTDL integrates differing terminal display techniques into a common language, freeing the application programmer from the specifics of terminal data handling and allowing him to concentrate on his primary function of providing a service to the terminal user.