Google is developing an operating system (OS) for personal computers, in a direct challenge to market leader Microsoft and its Windows system. Google Chrome OS will be aimed initially at small, low-cost netbooks, but will eventually be used on PCs as well. Google said netbooks with Chrome OS could be on sale by the middle of 2010. [URL]http://news.bbc.co.uk/1/hi/technology/8139711.stm[/URL] [url="http://googleblog.blogspot.com/2009/07/introducing-google-chrome-os.html"]http://googleblog.blogspot.com/2009/07/ ... me-os.html[/url]