h the development of semantic Web, a blueprint of new SDP which enables various device supports and allows personal- ized services within an open API platform is depicted by paper [6]. Service Delivery Platforms 6.1.2 Requirements in View of APIS Now that NDSDP is supposed to satisfy the increasing complicated telecom opera- tions, what are its requirements and characteristics? This chapter aims to depict a bird view of these requirements and characteristics in view of APIS, while a brief introduction is indicated in this section. The principle of APIS is proposed by Yong Zheng. Information technologies has benefited global development of information superhighway, especially information systems and service systems in various application areas, such as transportation, ticket business, stock market, government business, and SO on. Telecom area is not beyond exceptions, including CRM, ERP as well as SDP. When it comes to research on these systems, APIS is a potential principle along with the public requirements and developments. Specifically, APIS can be described as follows: Applications: The most elemental one is to meet basic requirements of com- puting and informationizing. As a case in point, both computer architectures, such as CPU and GPU, and software systems, such as CRM and ERP, belong to these kinds of applications. Performance: The second one is how to evaluate and improve performance of these applications in order to cut down costs and best utilize and optimize applications to achieve diverse goals. These technologies can be drawn from parallel computing and QoS guarantees. Intelligence: The next one is how to make these applications smarter and more intelligent to operate flexibly and autonomously without unnecessary manual interventions. Artificial intelligence is obviously one of these representative research branches. Security: The last one is how to protect and guarantee normal operations of all these applications under specific defined rules. Areas of cryptology and data security are mainly orient