3D Printing Materials, Additive Manufacturing, 3D Bio Printing, Nano 3D Printing, Polymers in 3D Printing, 3D printing in Biomaterials, 3D Electronics, Electromagnetics, and Metamaterials, 3D Printing in Tissue Engineering & Organ Printing, Clinical applications of 3D Printing in Orthopaedics and Traumatology, 3D Printing in Prosthetics, Applications of 3D Printing in Healthcare, Life sciences and Medicines, 3D Image Processing and Visualization, 3D Printing in Aerospace, Military and Engineering, 3D Printing in Architecture, Engineering & Construction, Lasers, Optical, Photonic Systems in 3D Printing, 3D Printing in Cultural Heritage and Art Conservation, Artificial Intelligence and 3D Printing, 3D printing in Digital Light Processing (DLP), 4D printing: Fundamentals, Materials, Applications and Challenges, Advanced Materials for Additive Manufacturing, Haptic Technologies, Design and Optimization for Additive Manufacturing, Industrial Applications of Additive Manufacturing, Emerging Technologies in Additive Manufacturing, Additive Manufacturing in Space Exploration, Machine Learning and Artificial Intelligence in Additive Manufacturing, Additive Manufacturing and 3D Robotics, Nano-Additive Manufacturing, Challenges and Future Directions in Additive Manufacturing Research, Regulatory and Ethical Issues in Additive Manufacturing.