This document discusses knowledge management and the benefits of open data. It argues that sharing knowledge as widely as possible through open data helps prevent loss of knowledge over time. Open data prepared with metadata and machine-readability can promote interoperability and reuse. However, realizing these benefits requires operational capacity, interoperable technology, and processes to facilitate data sharing. The document provides examples of open data sources from government, commercial companies, and research institutes. It also discusses applications and economic value of open data, as well as technical, political, and process considerations for implementing open data programs.