The International Society of Arboriculture (ISA) is a non-profit organization dedicated to promoting the professional practice of arboriculture. Founded in 1924, it focuses on the care and management of trees and other woody plants. The ISA provides education, research, and resources to help arborists improve their skills and knowledge. The organization also offers certification programs for arborists, ensuring they meet industry standards. Through its global network, the ISA fosters collaboration among professionals, researchers, and enthusiasts in the field of tree care. This helps advance the understanding of tree biology and the importance of trees in urban and natural environments.