MOBILE OPERATING SYSTEM

Android is one of the most popular operating systems for mobile devices such as smartphones, tablets, smart watches, and smart TVs. There are many reasons for its success, but two are probably the most relevant : it runs on an incredibly large variety of hardware configurations, which allows users to choose between high-level and cheaper devices, and it is highly customizable.
Android is a mobile operating system based on a modified version of the Linux kernel and other open source software.
It is designed primarily for touchscreen mobile devices such as smartphones and tablets of all companies. Android is developed by a consortium of developers known as the Open Handset Alliance and commercially sponsored by Google. It was unveiled in November 2007, with the first commercial Android device, the HTC Dream, being launched in September 2008.
Most versions of Android are proprietary. The core components are taken from the Android Open Source Project (AOSP), which is free and open-source software (FOSS) primarily licensed under the Apache License.
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.
Android has been the best-selling OS worldwide on smartphones since 2011 and on tablets since 2013. As of May 2021, it has over three billion monthly active users, the largest installed base of any operating system, and as of January 2021, the Google Play Store features over 3 million apps. Android 13, released on August 15, 2022, is the latest version.

HarmonyOS (HMOS) is a distributed operating system developed by Huawei to collaborate and interconnect with multiple smart devices on the Internet of Things ecosystem. In its current multi-kernel design, the operating system selects suitable kernels from the abstraction layer for devices with diverse resources. For IoT devices, the system is known to be based on LiteOS kernel, while for smartphones and tablets, it is based on a Linux kernel layer with AOSP libraries to support legacy APK apps, in addition to native Harmony OS HAP apps via the ARK Compiler.
The system includes a communication base DSoftBus for integrating physically separate devices into a virtual Super Device, allowing one device to control others and sharing data among devices with distributed communication capabilities. It supports several forms of apps, including the apps that can be installed from App Gallery on smartphones and tablets, installation-free Quick apps and lightweight Atomic Services accessible by users.
HarmonyOS was first used in Honor smart TVs in August 2019. and later used in Huawei smartphones, tablets and smartwatches in June 2021.
HarmonyOS is a next-gen operating system that can run on a wide range of smart devices. It enables different smart devices to speak the same language, facilitating better connection and collaboration, and bringing a simple, smooth, continuous, secure and reliable interaction experience in all scenarios.