Google I/O features highly technical, in-depth sessions focused on building web, mobile, and enterprise applications with Google and open web technologies such as Android , Chrome, Chrome OS ,Google APIs, Google Web Toolkit , App Engine , and more. Google I/O was started in 2008. The " I" and " O" stand for input/output , and " Innovation in the Open".
The format of the event is similar to that of the Google Developer Day .