A Software and Systems Process Improvement Network (SPIN) is an organization of professionals in a given geographical area who are dedicated to the improvement of software and systems engineering.
Joining a SPIN recognizes one's commitment and loyalty to improving the state of software and systems engineering, as well as placing one in contact with a network of expertise within their community. It is a practical forum for the interchange of ideas, information, and mutual support. Each regional SPIN is slightly different, based on the vision of the founders and the needs of the community.
SPINs are made up of professionals from all sectors -- industry, government, academia (including students) -- and include defense contractors, professional organizations, and independent consultants. Currently there are over 130 SPINs worldwide.