Payment card acceptance locations available to Mastercard and Visa cardholders worldwide reached 44.4 million at the end of 2016. Those locations include in-store, online, and in-app mobile outlets for purchases of goods and services as well as ATMs, bank branches, and other outlets where cardholders can obtain cash. The strongest growth was in Asia, particularly China. Small merchants using tablets and smartphones also contributed to growth. More than 11.3 million dongles—card readers inserted into mobile devices—were shipped in 2016. Discover cardholders had access to 42.9 million car...