This document summarizes a presentation by Paul Downey on registers from the Government Digital Service. It discusses the history and goals of GDS, including creating better government services across departments. It outlines GDS design principles like starting with user needs and iterating based on data. It also discusses building platforms and standards for things like addresses to create a digital ecosystem where data can be shared and built upon. The overall aim is to establish authoritative registers that provide open, trusted data to power digital government services.