SAP NetWeaver Process Integration (SAP PI) is SAP's enterprise application integration (EAI) software, a component of the NetWeaver product group used to facilitate the exchange of information among a company's internal software and systems and those of external parties.
Like other NetWeaver components, SAP PI is compatible with software products of other companies.
SAP calls PI an integration broker because it mediates between entities with varying requirements in terms of connectivity, format, and protocols.
According to SAP, PI reduces the TCO by providing a common repository for interfaces.
The central component of SAP PI is the SAP Integration Server, which facilitates interaction between diverse operating systems and applications across internal and external networked computer systems.