Hanoi-Amsterdam Organization (H-A-O) is an official network of students and alumni of Hanoi Amsterdam High School, Hanoi, Vietnam. H-A-O is organized exclusively for education and charitable purposes within the meaning of Section 501(c)(3) for Non-Profit Organization. H-A-O aims to connect all the school's students, alumni, and others who are interested in the organization's activities. H-A-O provides valuable supports to its members, in education, life, and professional career.