Interapplication communication. The capability of one computer program to communicate with another program. With IAC, two (or more) programs can execute simultaneously, share data, and make requests of each other. ArcInfo Version 7 and ArcView Version 2 support IAC. IAC tools in AML (ARC Macro Language) support real-time GIS, a network GIS process server, interoperability, and open integration between ArcInfo and other applications. In a client/server environment the command references on the client side are IACCONNECT, IACDISCONNECT, and IACREQUEST; on the server side are IACOPEN, IACCLOSE, and &IACRETURN.
