The Modelling Inventory and Knowledge Management System of the European Commission (MIDAS) is a Commission-wide knowledge management tool for modelling, enabling enhanced transparency and traceability of models in use for EC policy making. It forms an integral part of the Competence Centre on Modelling (CC-MOD) of the Joint Research Centre of the European Commission (JRC). This document describes MIDAS, by providing a bird's-eye view of the MIDAS content, architecture, and functionality, and identifying the benefits of the system for the organisation and in the context of the Better Regulation Agenda.JRC.I.2-Foresight, Modelling, Behavioural Insights & Design for Polic