We set out the rationale for a web-deployable application for checking media files in and out of a repository in the context of an ongoing investigation into the use of web technologies in production environments. The use cases for such an application are listed, and a specification fulfilling those use cases is presented. "CICO" (Check-In/Check-Out), an application written to that specification is then documented, along with justification for the design decisions made as part of the development process. Possible future changes to and uses of the application are then discussed.