The Free On-line Dictionary of Computing (30 December 2018):

Common Management Information Services
CMIS

    (CMIS) Part of the OSI body of network
   standards.

   Network management information services are used by peer
   processes to exchange information and commands for the
   purpose of network management.  CMIS defines a message set
   (GET, CANCEL-GET, SET, CREATE, DELETE, EVENT-REPORT and
   ACTION), and the structure and content of the messages such
   that they might be used by "open" systems.  In concept, it is
   similar to SNMP, but more powerful (and hence more complex).

   ISO/IEC 9595.

   (2007-08-07)