A man–machine language (MML) is a

specification language A specification language is a formal language in computer science used during systems analysis, requirements analysis, and systems design to describe a system at a much higher level than a programming language, which is used to produce the exec ...

. MMLs are typically defined to standardize the interfaces for managing a telecommunications or network device from a console.

ITU-T The International Telecommunication Union Telecommunication Standardization Sector (ITU-T) is one of the three Sectors (branches) of the International Telecommunication Union (ITU). It is responsible for coordinating Standardization, standards fo ...

Z.300 series recommendations define an MML, that has been extended by

Telcordia Technologies iconectiv supplies communications providers with network planning and management services. The company’s cloud-based information as a service network and operations management and numbering solutions span trusted communications, digital identi ...

(formerly

Bellcore iconectiv supplies communications providers with network planning and management services. The company’s cloud-based information as a service network and operations management and numbering solutions span trusted communications, digital identi ...

) to form Transaction Language 1.

Further reading