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Operations support system

computer system used by telecommunications service providers to manage their networks (e.g., telephone networks); supports management functions such as network inventory, service provisioning, network configuration and fault management

Pronunciation
/ˌɑpəˈreɪʃənz səˈpɔrt ˈsɪstəm/
/ɒpəˈreɪʃənz səˈpɔːt ˈsɪstəm/