Android (operating system)

 Android is a mobile operating system (32-bit and 64-bit) based on a modified version of the Linux kernel and other open-source software, designed primarily for touchscreen mobile devices such as smartphones and tablets. Android is developed by a consortium of developers known as the Open Handset Alliance, though its most widely used version is primarily developed by Google. It was unveiled in November 2007, with the first commercial Android device, the HTC Dream, being launched in September 2008.

Android

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Screenshot
Developer	Various (mostly Google)
Written in	Java, Kotlin (UI), C (core), C++ and others
OS family	Unix-like (modified Linux kernel)
Working state	Current
Source model	Open source, freeware (most devices include proprietary components, such as Google Play Services or One UI)
Initial release	September 23, 2008; 15 years ago
Latest release	Android 14 / October 4, 2023; 2 months ago
Latest preview	Android 14: QPR1 Beta 2 (U1B2.230922.006) / October 5, 2023; 2 months ago[1]
Repository	android.googlesource.com
Marketing target	Smartphones, tablet computers, smart TVs (Android TV), Android Auto and smartwatches (Wear OS)
Available in	100+ languages
Update method	Over-the-air
Package manager	APK-based
Platforms	ARM64 (previous versions were also compatible with ARMv7, x86, x86-64 and RISC-V; these architectures are still unofficially supported via third-party solutions)[2][3]
Kernel type	Monolithic (Linux kernel)
Userland	Bionic libc, mksh shell, Toybox as core utilities
Default user interface	Graphical (multi-touch)
License	Apache License 2.0 for userspace software GNU GPL v2 for the Linux kernel modifications
Official website	android.com
Support status
Supported
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Android version history

At its core, the operating system is known as the Android Open Source Project (AOSP)^[4] and is free and open-source software (FOSS) primarily licensed under the Apache License. However, most devices run on the proprietary Android version developed by Google, which ships with additional proprietary closed-source software pre-installed,^[5] most notably Google Mobile Services (GMS)^[6] which includes core apps such as Google Chrome, the digital distribution platform Google Play, and the associated Google Play Services development platform. Firebase Cloud Messaging is used for push notifications. While AOSP is free, the "Android" name and logo are trademarks of Google, which imposes standards to restrict the use of Android branding by "uncertified" devices outside their ecosystem.^[7][8]

Over 70 percent of smartphones based on the Android Open Source Project run Google's ecosystem (which is known simply as Android), some with vendor-customized user interfaces and software suites, such as TouchWiz and later One UI by Samsung and HTC Sense.^[9] Competing ecosystems and forks of AOSP include Fire OS (developed by Amazon), ColorOS by Oppo, OriginOS by Vivo, MagicUI by Honor, or custom ROMs such as LineageOS.

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, and PCs, each with a specialized user interface. Some well-known derivatives include Android TV for televisions and Wear OS for wearables, both developed by Google. Software packages on Android, which use the APK format, are generally distributed through proprietary application stores like Google Play Store, Amazon Appstore (including for Windows 11), Samsung Galaxy Store, Huawei AppGallery, Cafe Bazaar, GetJar, and Aptoide, or open source platforms like F-Droid.

Android has been the best-selling OS worldwide on smartphones since 2011 and on tablets since 2013. As of May 2021, it had over three billion monthly active users, the largest installed base of any operating system in the world,^[10] and as of January 2021, the Google Play Store featured over 3 million apps.^[11] Android 14, released on October 4, 2023, is the latest version, and the recently released Android 12.1/12L includes improvements specific to foldable phones, tablets, desktop-sized screens^[12] and Chromebooks.

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