The document summarizes the major organizational systems working for rural development in India. It discusses the four main streams: 1) ICAR institutes and agricultural universities, 2) Ministry of Agriculture extension systems, 3) Ministry of Rural Development extension systems, and 4) voluntary organizations. It then provides details on several key extension programs established by ICAR, including National Demonstrations (1964), Operational Research Projects (1972), Krishi Vigyan Kendras (1974), Lab to Land programs (1979), Frontline Demonstrations, and Technology Assessment and Refinement programs. It discusses the objectives and roles of these various extension programs.