 The ARGO program is a global array of about 4,000 profiling floats that has been in operation for almost two decades. It provides continuous observations of ocean temperature, salinity, and pressure from the surface to 2,000 bar. The program's success was due to the combination of scientific need and technological innovation, and its data management system allows for fundamental physical observations with broad societal applications. Recent advances in platform and sensor technologies provide an opportunity to improve ARGO's global coverage and value beyond its original design. Possible enhancements include extending ARGO to span the full ocean depth, adding biogeochemical sensors for carbon, nutrients, and ecosystems, and considering experimental sensors for ocean mixing patterns. The progression from experimental deployments to regional pilot arrays to global implementation is described for each enhancement, with the goal of creating a fully global, top-to-bottom, dynamically complete, and multidisciplinary ARGO program that integrates seamlessly with satellite and other in situ elements of the global ocean observing system. The integrated system will deliver operational reanalysis and forecasting capability, assess the state and variability of the climate system with respect to physical, biogeochemical, and ecosystems parameters, enable basic research of unprecedented breadth and magnitude, and provide ocean education and outreach opportunities. This article was authored by Dean Romick, Matthew H. Alford, Irve Claustre, and others. We are article.tv, links in the description below.