This article provides a historical timeline of fuel cell development and commercialization and provides key statistics of fuel cell sales and shipment volumes in recent years. A general approach to choosing fuel cells for a given application is provided, and the various applications (portable, transportation, stationary, etc.) are presented, with a discussion of the status of relevant fuel cell technologies for each application. The article concludes with an outlook for fuel cells and presents pathways forward to hasten the commercialization of fuel cell technologies.