The original idea of the founding members Prof. Y. Kawazoe, Prof. B.L. Gu and Prof. G.P. Das was to share the computational resources, exchange of students, promote bi-lateral and muti-lateral agreements amongst research institutions in member countries, create computational data bases, establish Industry-Academia interactions and most importantly develop state-of-the-art software package for materials simulation with predictive capability.  With this objective, ACCMS started its journey in the year 2000 in Sendai under the leadership of Prof. Kawazoe, which was followed by successful organization of bi-annual General Meetings, starting with ACCMS-1 in 2001 in India, and the latest one ACCMS-11 in 2024 in Yokohama ). Apart from these 11 General Meetings, we have had 8 Theme / Working Group Meetings, 12 Virtual Organization (VO) Meetings, 41 Webinars and 10 Tutorial Session for young researchers. ACCMS-12 General Meeting marks a significant milestone, as the conference returns to India after nearly a quarter century. Hosted by SRM University-AP, the event will gather global experts working at the frontiers of materials modeling, simulation, high-performance computing, and AI-driven materials discovery.