Coalitions are groups of organizations or individuals who come together to achieve a common goal or address a specific issue. In the context of the SIC Code 8399, coalitions are focused on social services that are not classified elsewhere. These coalitions can be formed by non-profit organizations, government agencies, community groups, or other stakeholders who share a common interest in improving social services. Coalitions can take many forms and operate at different levels, from local to national. They can be focused on a specific issue, such as homelessness, domestic violence, or mental health, or they can be more general in nature, such as coalitions focused on improving access to social services for underserved populations. The work of coalitions can involve advocacy, education, research, and direct service provision.