Implementation of OSI application layer using ISO Development Environment

ISO Development Environment (ISODE) is a non-proprietary implementation of the upper-layers of Open Systems Interconnection (OSI) protocol suite over TCP/IP (acronym for Transmission Control Protocol/Internet Protocol) internetwork. It is the best development platform for OSI applications and application services for research environment. This paper describes the implementation of application layer using ISODE based on the author's implementation of Manufacturing Message Specification (MMS). This paper also describes some issues on the implementation of MMS Interface (MMSI), the standardized application program interface (API) for MMS.