Definition - What does Multiple System Operators (MSO) mean?
Multiple system operators (MSO) are operators of multiple cable television systems. The majority of system operators run cable systems in more than one community and hence most of them are multiple system operators.
Techopedia explains Multiple System Operators (MSO)
Cable systems in United States serve single communities or distinct government entities each with their own franchise agreement with cable companies. Multiple system operators are companies that acquire multiple CATV systems brought under control of single corporate entity where individual CATV systems may or may not be combined to single networks or combined at regional or metropolitan levels.