 The ARGO program was developed over the last two decades to provide continuous observations of ocean temperature and salinity versus pressure from the sea surface to 2000 bar. This program utilizes autonomous profiling floats which are deployed globally and collect data that can be used to study ocean circulation, climate change, and other environmental issues. Recent advances in technology have allowed for improvements to the ARGO network, including extending it to cover the entire ocean depth, adding biogeochemical sensors, and experimenting with new sensors to measure ocean mixing. These advances have enabled the ARGO program to become more comprehensive and valuable to society. This article was authored by Dean Romick, Matthew H. Alford, Hervé Clauss-Tray, and others.