摘要：The goal of this article is to proposing a conceptual model explaining the Information Systems Integration. In this paper, passing the concept of Intra-Organizational Information Systems Integration, we emphasis on the concept of Inter-Organizational Integration.The problem is what the Information Systems Integration is, and which problems the organizations face.The method using in this research is a four step method proposed according to the system thinking and related theories in this domain. Due to the fact that, emphasizing on the Inter-Organizational Information Systems, at the first step we draw an expanded conceptual model of the Organizational Informatics Doman between the two organizations. After that, this model expands within the network of organizations. This model has a lot of applications. For example, using this model, we can provide a list of the important and required managerial and technical issues for the successful implementation of integration projects, which these expensive projects and programs will fail without this notification. Moreover, aggregating cognitive propositions extracting from this model, we are able to achieve an initial theory regarding Information Systems Integration.
关键词：conceptual model;complex systems;expanded organizational informatics domain;integration;inter; organizational information systems
