What is Selenium : Selenium is a free (open source) automated testing suite for web applications across different browser and platforms. It is quite similar to HP Quick Test pro (QTP) Only that selenium focuses on automating web based applications.
Selenium is not just single tool bit a suite of software, each catering to to different testing needs of an organization.
It has four components:
► Selenium Integrated Development Environment (IDE)
► selenium Remote Control (RC)
►Selenium Webdriver
► Selenium Grid