the networks keeps on increasing when the OSS/BSS framework is not supporting the advances in network and service technology. The problem most service providers face is considerable effort to have an OSS/BSS framework that can manage a new network and effectively bill the customer to yield business benefits. There are multiple OSS/BSS applications that are discussed in this chapter. These applications makes it easy to manage the network and services in a mul- tiservice, multitechnology, and multivendor environment. Standardizing bodies are coming up with standards and guidelines in developing these management solutions. Current developments in telecom industry have lead to the addition of new networks and expansion of existing networks to support new technologies and products. The networks will continue to evolve and the only way to perform network management in a cost effective and operationally friendly manner is to do cost-effective OSS/BSS management. This chapter gives the reader an overview of the management applications that make up the OSS/BSS stack from a holistic perspective. It considers the customer, service, and network layers in OSS/BSS and the applications that are used for man- aging interactions with third-party vendors, suppliers, stake holders, and partners. The intent is to meet the goal of this book, which is to give the reader a fundamental understanding of the concepts without diving into the details of a specific topic. It is important to note that TeleManagement Forum (TMF) has come up with a Telecom Application Map (TAM), which is an application framework that can be referred to for understanding the role and the functionality of the various applications that deliver OSS and BSS capability. The TAM documents provide a Management Applications comprehensive description of management applications and the components that make up the individual applications. TAM is part of NGOSS and has applications defined under groups similar to SID and eTOM to ensure that applications can be easily mapped 