There are two kinds of systems of identifiers around: extrinsic and intrinsic. You probably know everything already about extrinsic identifiers, as you use PIDs. Did you know that there is a new game in town? Intrinsic identifiers are here: they are computed directly from the objects they identify, and do not need minting or registration. In this session, you will discover the basics on intrinsic identifiers, and hear reald world stories from early adopters of the Software Heritage Identifiers (SWHID), the hottest intrinsic identifiers on the block.