The Protégé project, initiated at Stanford University in the 1980s, has evolved into a widely used software for building and maintaining ontologies. Despite its long duration, the project continues to be a significant resource for developers and researchers. Protégé has been recognized with the "Ten Years" Award at the International Semantic Web Conference in 2014, acknowledging its impact and the need for computational infrastructure in the AI community. Protégé has become the most popular software for ontology development, with over 250,000 registered users and extensive use by Fortune 500 companies and government projects. It supports various frameworks, including a desktop system (Protégé 5) and a web-based system (WebProtégé), which offers distributed access and collaborative editing capabilities. The software has evolved from its early versions, which focused on knowledge-based systems, to a versatile platform for ontology engineering, driven by user feedback and contributions. The project's success is attributed to its open-source license, adherence to W3C recommendations, and the active support of a global user community. The Protégé team has also conducted research on collaborative ontology development, ontology alignment, and evaluation methods, contributing to the broader field of AI. Despite funding challenges, the project has thrived, highlighting the importance of sustained support for long-term research infrastructure in the AI community.The Protégé project, initiated at Stanford University in the 1980s, has evolved into a widely used software for building and maintaining ontologies. Despite its long duration, the project continues to be a significant resource for developers and researchers. Protégé has been recognized with the "Ten Years" Award at the International Semantic Web Conference in 2014, acknowledging its impact and the need for computational infrastructure in the AI community. Protégé has become the most popular software for ontology development, with over 250,000 registered users and extensive use by Fortune 500 companies and government projects. It supports various frameworks, including a desktop system (Protégé 5) and a web-based system (WebProtégé), which offers distributed access and collaborative editing capabilities. The software has evolved from its early versions, which focused on knowledge-based systems, to a versatile platform for ontology engineering, driven by user feedback and contributions. The project's success is attributed to its open-source license, adherence to W3C recommendations, and the active support of a global user community. The Protégé team has also conducted research on collaborative ontology development, ontology alignment, and evaluation methods, contributing to the broader field of AI. Despite funding challenges, the project has thrived, highlighting the importance of sustained support for long-term research infrastructure in the AI community.