Some well known derivatives include Android TV for televisions and Wear OS for wearables, both developed by Google. The source code has been used to develop variants of Android on a range of other electronics, such as game consoles, digital cameras, portable media players, PCs and others, each with a specialized user interface. However the "Android" name and logo are trademarks of Google which impose standards to restrict "uncertified" devices outside their ecosystem to use Android branding. Competing Android ecosystems and forks include Fire OS (developed by Amazon) or LineageOS. Over 70 percent of Android smartphones run Google's ecosystem some with vendor-customized user interface and software suite, such as TouchWiz and later One UI by Samsung, and HTC Sense. However most Android devices ship with additional proprietary software pre-installed, most notably Google Mobile Services (GMS) which includes core apps such as Google Chrome, the digital distribution platform Google Play and associated Google Play Services development platform.
It is free and open-source software its source code is known as Android Open Source Project (AOSP), which is primarily licensed under the Apache License.
It was unveiled in November 2007, with the first commercial Android device, the HTC Dream, being launched in September 2008. Android is developed by a consortium of developers known as the Open Handset Alliance and commercially sponsored by Google.
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