A repository (often shortened to 'repo') is a central storage location where software code, project files, and version history are kept. Repositories track changes over time, allowing developers to collaborate, review modifications, and revert to previous versions if needed. Popular repository platforms include GitHub, GitLab, and Bitbucket. Open-source projects like Drupal (which powers CanuckDUCK) maintain public repositories where anyone can view the code, report issues, and contribute improvements. Version control systems like Git manage repositories, keeping track of who changed what and when. Government agencies increasingly use repositories to share open data and code for transparency.