An introductory talk on the ethical issues in cataloguing and classification presented by Deborah Lee, Senior Teaching Fellow at UCL. Ethical issues in cataloguing and classification are a critical area of library thinking and practice, and are high priorities for libraries seeking to make their services and collections more inclusive and diverse. Interestingly, the contemplation of the ethical dimensions of how our bibliographic resources are described and organised has a long pedigree in both theory and practice. In this talk, the ideas surrounding cataloguing ethics are introduced. First, the talk focuses on the problematic design of description and organising systems, including a broad overview of some of the research carried out in this area. Second, the talk will contemplate the ethics of cataloguing and classification practices, including topics such as codes of ethics and particular ethical issues arising from the description and classification of art materials. Third, the talk considers the wider context of introducing more ethical practices in cataloguing and classification, including the inherent tensions between designing in inclusivity in a local setting and following global practices, and the potential barriers towards changes.