HBSAB | HBS Association of Boston and CAP | 3,022 followers on LinkedIn. We connect leaders who make a difference in the world and help small business owners in their journey. | HBS Association of Boston (HBSAB) is a nonprofit organization serving over 8,000 cross-generational HBS alumni, the school and the broader Boston Business community. As one of the largest global HBS networks. HBS Association of Boston focuses its efforts across 3 business Pillars: Leadership, Entrepreneurship and Social Enterprise.