A man–machine language (MML) is a specification language. MMLs are typically defined to standardize the interfaces for managing a telecommunications or network device from a console.
ITU-T Z.300 series recommendations define an MML, that has been extended by Telcordia Technologies (formerly Bellcore) to form Transaction Language 1.
Further reading
edit- Hornbach, Barbara (1982). "MML: CCITT Man-Machine Language". IEEE Transactions on Communications. 30 (6): 1329–1336. doi:10.1109/TCOM.1982.1095582.