U°OS is a universal reputation system constituting an open-source blockchain protocol. it is built to be the standard for evaluation of trustworthiness on the emerging decentralized web.

U°OS introduces DPoI, a unique consensus algorithm, that takes into account not only the monetary stake of an account but also the value it creates for the network, calculating it via account's incoming transfer and social activity.

The U°OS reputation system already has use-cases/dApps, such as u.community, a social platform, which serves as an explorer and interface to the blockchain.

Unlike other chains, U°OS records both economic transfers and social interactions on the blockchain.
Social transactions allow the exchange of non-monetary value in a blockchain. For example, U°Community dApp uses the social transactions to upvote, downvote, publish content and follow or trust users. Social transactions along with economic ones are used to calculate reputation or Importance of digital entities