A social network is a social structure made up of a set of actors (such as individuals or organizations) and the dyadic ties between these actors (such as relationships, connections, or interactions). A social network perspective is employed to model the structure of a social group, how this structure influences other variables, or how structures change over time.http://en.wikipedia.org/wiki/Social_network#cite_note-WF94CH1-0 The study of these structures uses methods in social network analysis to identify influential nodes, local and global structures, and network dynamics.
Source: → en.wikipedia.org/wiki/Social_network
Formal organizations are social groups that distribute tasks for a collective goal. There are a variety of legal types of organizations, including: corporations, governments, non-governmental organizations, international organizations, armed forces, charities, not-for-profit corporations, partnerships, cooperatives, and universities. A hybrid organization is a body that operates in both the public sector and the private sector, simultaneously fulfilling public duties and developing commercial market activities. As a result the hybrid organization becomes a mixture of a government and a corporate organization.