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This paper aims to contribute to the development of a process based conceptual model of electronic procurement. Model is based on three basic eprocurement processes – strategic, tactical and operational eprocurement. Processes are divided into phases which are supported by applications (i.e. software programmes). Apart from applications supporting basic procurement activities there is a currently fast growing group of ADM (Analytical - Decision support - Management) applications, which brings business benefits especially in complex procurement environments. The basic view is that of ICT’s (Information and Communication Technologies - namely Internet, Internet technologies, Internet standards, Internet applications) support of procurement activities. Paper presents integrated e-procurement applications and also various integration requirements of e-procurement applications. Model may perhaps help enterprises, which are new to e-procurement, e.g. SMEs, to gain basic understanding of which applications may be used for implementation of eprocurement processes.