This volume contains a collection of the papers presented during the 1st InternationalACM-L Workshop, which was held on November 8, 2006 during the 25thInternational Conference on Conceptual Modeling, ER 2006, held November 6–9,2006, in Tucson, Arizona, plus several invited papers. From 26 papers submittedto the workshop, a total of 11 papers were selected for inclusion in this volume.These papers plus the invited papers represent the current thinking in conceptualmodeling research.To achieve the ACM-L goals, we need the participation of many researchgroups with different skill sets. The active model can only be realized throughtechnology integration (e.g., AI, software engineering, information technology,cognitive science, art and sciences, philosophy, etc.) and by combining relatedmodeling techniques. The current state of the art in conceptual modeling canbe used as the starting point. Modeling techniques will need to be combined tomodel different characteristics of the world (e.g., temporal, multimedia, spatial,cognitive, philosophical, historical, etc.) in a holistic and visualized manner.