Google announced they were developing their own operating system in 2009. The Linux-based system is pretty minimal and revolves around the Chrome Web browser, as all applications are Web-based. Google turned it into an open-source project called Chromium OS, similar to Android's open-source nature.
Although it hasn't taken over the market, it has taken over a chunk of the lower-price market. Chromebooks run usually for less than $300 and now account for 20 to 25 percent of the extreme value market, according to a study by NPD.