Virtyally all phones sold today include short messaging service(SMS), which allows mobile phone users to send short text messages to each other. For years, mobile phones such as the BlackBerry have had the ability to send and receive e-mail, but until recently, many owners of these phones used them only for phone calls. However, two developments coincided in the United States in 2008 that made these phones more viable as devices for browsing the Web. First, high-speed mobile telephone networks grew dramatically in availability, and second, manufacturers began offering a wide variety of smart phones that include a Web browser(and a screen large enough to make it usable), an operating system, and the ability to run applications on that operating system. In this section, you will learn about the impact of this confluence of technologies on the potential for online business using these devices, called mobile commerce(m-commerce)