OBOS, or the Oslo Bolig- og Sparelag, is a Norwegian housing cooperative that focuses on providing affordable housing options for its members. Established in 1929, OBOS aims to make homeownership accessible by offering various services, including financing and property management. Members can buy shares in the cooperative, which allows them to participate in the decision-making process regarding housing developments. The cooperative operates primarily in Norway and has expanded its services to include residential projects, community development, and sustainability initiatives. OBOS is one of the largest housing cooperatives in Scandinavia, promoting a sense of community and shared responsibility among its members.