This grant supports the continued development of the Jupyter Notebook, an open source platform for interactive computing that aims to bring the traditional research notebook into the digital age, enabling researchers to capture, log, and version their work from data collection through stages of cleaning, linking, and preparation all the way to analysis and publication. Grant funds will allow the project, led by physicists-turned-data-scientists Fernando Perez and Brian Granger, to hire a project manager and user interface designer, enhance coordination with the growing community of Juypter volunteer developers, and add new features to the platform, including simultaneous multi-user editing, interactive computing capabilities, and better integration with scholarly publishing systems.