Selenium 2.0 - is a tool for automated functional testing, which includes two previously independent projects - Selenium Remote Control (Selenium RC) and webDriver (Selenium WD). Selenium 2.0 allows you to use all the tools like Selenium WebDriver, and Selenium RC. Selenium developers recommend to use Selenium webDriver, as Selenium RC was officially deprecated. While working at Selenium 2.0 they mainly developed Selenium WebDriver and its compatibility with Selenium RC. Selenium RC itself was not changed much.