SPIN, which stands for SPontaneous INtelligence, is an informal learning system. As such, it is essentially a customized knowledge base that all employee can access to search for manuals, forms, policies, and other information quickly and (at least to them) anonymously.
The goal of SPIN is simple: have a system that stores all company information and documents so people can find what they are looking for quickly, without fear of looking stupid or taking up the valuable time of your more experienced people.
For more information, please watch this short video.