Harvard Startups - Electronic networking for people and companies with Harvard connections. Site includes e-mail list signup and schedule of events. - http://www.harvard-startups.org/
Harvard Public Service Network - Listing of, and highlights of, student public service organizations on campus. - http://www.fas.harvard.edu/~pbh/
Harvard Neighbors - University-wide, volunteer-run organization serving staff and faculty and their spouses or partners. Site includes calendar, interest groups, and volunteer opportunities. - http://www.neighbors.harvard.edu/
Harvard Habitat for Humanity - Allows students to help build affordable housing alongside disadvantaged families who wish to become independent homeowners. Site includes planned and past trips, officers, and contact information. - http://hcs.harvard.edu/~habitat/
Harvard Math Club - For undergraduates in math. Information about courses, REU's, graduate schools, Women in Math, thesis writing. - http://abel.math.harvard.edu/mathtable/
Harvard Law School Forum - Non-partisan student organization of Harvard Law School dedicated to bringing open discussion of a broad range of legal, political and social issues to the Harvard Law School campus. - http://www.law.harvard.edu/students/orgs/forum/
Harvard Law School Federalist Society - A group of conservative, libertarian, and moderate law students who believe in individual freedom, limited government, and judicial restraint. Site includes events, officers, weblog, and links. - http://www.law.harvard.edu/students/orgs/fedsoc/
Harvard Vietnamese Association - Dedicated to fostering an awareness of Vietnamese culture on campus and within the Greater Boston area, and promoting the interests of the Vietnamese student body at Harvard. Site includes constitution, officers, activities, and links. - http://hcs.harvard.edu/~hva/
Harvard Undergraduate Council - Contains news, events calendar, services, and information about the council. - http://uc.fas.harvard.edu/
Harvard BGLTSA - Student-run, student-led organization dedicated to the visibility, strength, support, and defense of the Harvard-Radcliffe undergraduate bisexual, gay, lesbian, and transgendered community. - http://www.hcs.harvard.edu/~queer/
Civil Liberties Union of Harvard - Student-run civil liberties advocacy group. Site includes constitution, by-laws, and contact information. - http://hcs.harvard.edu/~cluh/
Harvard Buddhist Community - Offers daily morning meditation, social evenings, and hosting well-known dharma teachers from around the world. - http://www.hcs.harvard.edu/~hbc/index.php
IMPACT - An independent organization of Harvard students committed to raising funds for grassroots projects in developing countries. Site includes descriptions of projects and officers and links to related sites. - http://www.hcs.harvard.edu/~impact/
The Harvard Computer Society - An undergraduate student group dedicated to promoting, improving, and developing interest in computing and information technologies among members of the Harvard community. - http://hcs.harvard.edu/
Digitas - Undergraduate student organization dedicated to enhancing undergraduate life at Harvard through the active use and promotion of high technology. Site includes volunteer information and links to online tools such as the Course Decision Assistant (CDA). - http://www.digitas.harvard.edu/
Harvard Gay & Lesbian Caucus - Members include more than 2,300 gay, lesbian, bisexual and transgendered Harvard and Radcliffe alumni/ae, faculty, and staff. Your link to Harvard's gay family. - http://www.hglc.org/