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In this paper, we propose a human computer interaction model through consolidation and visualization for order entry systems. This model makes effective use of the patient database and features 1) the consolidation of order data, 2) the visualization of the order data two or more contextual viewpoints, and 3) a new data entry and decision support function which consists of several data validation functions. The proposed model supports doctors' comprehension of order data by presenting the diversity, continuity, and regularity. This model has been incorporated into the order entry system and is now being run on an experimental basis. The effectiveness of this system was verified by the questionnaire survey from doctors and the analysis of consolidation.