Volume 81 of “Neutrosophic Sets and Systems” features diverse applications of neutrosophic theory across various domains of science and engineering. The collection of papers explores advanced methodologies and models for addressing complex problems characterized by uncertainty, imprecision, and vagueness. A primary focus is on the development and application of neutrosophic frameworks for multi-criteria decision-making (MCDM), with studies evaluating teaching quality in higher education, assessing service quality in tourism, and analyzing the performance of industrial systems such as the new energy vehicle supply chain. The volume also includes theoretical contributions, such as research on neutrosophic graphs and their connectivity, the use of different types of neutrosophic sets like Type-2, Triangular, and HyperSoft Sets, and a bibliometric analysis of the journal itself. These papers demonstrate the versatility of neutrosophic theory as a tool for solving real-world challenges, including the evaluation of landscape design for abandoned coal mine sites, risk assessment of municipal projects, and the prioritization of higher education management strategies for sustainability.