What is information system integration? What is the definition of information system integration?

1. Definition of information system integration: ways, methods, standards and technologies to realize information sharing, exchange and collaboration among various heterogeneous systems, applications and data sources.

2. It usually includes the following four aspects: hardware (network) integration-connecting subsystems with hardware devices, application (software) integration-interaction between multiple heterogeneous systems, information (data) integration-ensuring the consistency of information in multiple systems, business (process) integration-business process integration across application systems.