The Palm Centro is a smartphone that was marketed by Palm, Inc. beginning with its release on October 14, 2007, offering the functionality of the larger Treo 755p in a smaller size. As of August 2008, the Palm Centro was the second-ranked US smartphone based on internet traffic, responsible for 78% of the traffic on Palm devices; it fell to fourth in February 2009, responsible for 86% of Palm traffic. The Centro is among the last devices released with the Palm OS operating system, superseded by Palm's webOS, which debuted on the Palm Pre in June 2009.