Operations Support System Network management system supporting a specific management function, such as alarm surveillance and provisioning, in a carrier network
SAP's Online Service System offers fast and effective help for R/3 System problems It is also the basic element of communications between customers, partners, and SAP
Operation Support System (OSS) A software system that allows operators in a telecommunications service provider to control and monitor their networks An interface that provides operations, administration and maintenance (OAM) capabilities for multiple network elements