Advanced program to program communications. APPC is an LU 6.2 protocol in an SNA network. APPC supports client/server and distributed computing between IBM mainframes, and midrange and personal workstations.
IBM's peer-to-peer protocol for a System Network Architecture (SNA) network. The APPC protocol is independent of the computer operating system, programming language, and hardware interface environment. It allows the client and server to communicate over an SNA network without forcing the client to emulate a terminal.
A set of IBM protocols also known as LU 6.2 and Type 2.1 architectures. It functions within SNA's APPN to support peer to-peer communications between workstations attached to SNA LANs and the applications running on those workstations. It was added to SNA as part of the "new" SNA to support peer to-peer networking, unlike the traditional hierarchical SNA approach in which the mainframe acts as host or master and treats the other computer as a terminal or slave.
Advanced Program-to-Program Communications. A set of IBM protocols, part of its Systems Network Architecture (SNA), that allows executing applications to communicate directly with one another as peers without intervention by a mainframe host.