<b>Special issue IYQ in PAC</b>

Abstract 2025 was proclaimed by the United Nations proclaimed the International Year of Quantum Science and Technology (IYQ). This year-long and worldwide initiative aims at increasing public awareness of the importance of quantum science and applications. As the world authority on chemical nomenclature and terminology, standardized methods for measurement, atomic weights and many other critically evaluated data, IUPAC is naturally a supporter. Compiled under the leadership of Russell Boyd and Manuel Yáñez acting as co-editors, a special issue of IUPAC journal Pure and Applied Chemistry (PAC) is dedicated to the celebration of IYQ.