Open Source is a term that originally referred to open source software (OSS). Open source software is code that is designed to be publicly accessible—anyone can see, modify, and distribute the code as they see fit.
Decentralization is the process by which the activities of an organization, particularly those regarding planning and decision-making, are distributed or delegated away from a central, authoritative location or group.
Full control is the ability to control the entire process of a product or service. This includes the ability to control the quality, quantity, and delivery of the product or service.