Google was founded in 1998 by Larry Page and Sergey Brin with the mission to organize the world's information and make it universally accessible. It has grown to be the largest search engine with over 20,000 employees and a business model based on AdWords and AdSense. Google indexes over 25 billion webpages using caches and cloud computing with the goal of providing the best search results at the lowest possible cost through its use of modular data centers, commodity hardware, and efficient microprocessors.