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Android

Android is a mobile operating system developed by Google. It is based on a modified version of the Linux kernel and other open source software, and is designed primarily for touchscreen mobile devices such as smartphones and tablets. In addition, Google has further developed Android TV for televisions, Android Auto for cars, and Wear OS for wrist watches, each with a specialized user interface. Variants of Android are also used on game consoles, digital cameras, PCs and other electronics.

Kotlin

It is a static typing programming language that runs on the Java virtual machine and can also be compiled into JavaScript source code. It is mainly developed by JetBrains in its offices in St. Petersburg.

Java

It is a general-purpose, concurrent, object-oriented programming language that was specifically designed to have as few implementation dependencies as possible.