APPC (Advanced Program-to-Program Communication)

APPC (Advanced Program-to-Program Communication) is a communication protocol developed by IBM that enables different software programs to interact and exchange data seamlessly over a network or within a system. It allows applications to send messages, share information, and coordinate actions without needing to understand each other's internal details. This promotes interoperability, flexibility, and efficient resource use in complex computing environments, such as large enterprise systems. Essentially, APPC acts as a structured conversation channel between programs, simplifying how they work together across different platforms or locations.