What is the fine-grained topic of the following text: During his tenure, Owens introduced agile development and DevOps methodologies to the agency, encouraged the release of open data and worked to shut off legacy patent systems, systems that are on pace to be phased out by 2020. Only return the topic.
Owens' implementation of agile development, DevOps methodologies, open data release, and phasing out of legacy patent systems during his tenure at the agency.