Android

Background
Android is a mobile operating system designed primarily for touchscreen mobile devices such as smartphones and tablets. The core of the operating system, known as the Android Open Source Project (AOSP), is based on a modified version of the Linux kernel with multiple open-source software dependencies. It is primarily licensed through the Apache License. It is developed by a consortium of developers known as the Open Handset Alliance; however, the most widely used version is developed by Google, which includes proprietary closed-source software developed by Google themselves, in cooperation with the manufacturer of the device, such as Samsung's One UI. The Android name and logo are currently trademarks of Google. Many of the leading mobile phone brands today run on Google's Android software, including the Samsung Galaxy series. Several manufacturers have made forks of AOSP to compete with Google's ecosystem, such as Amazon's Fire OS and custom ROMs like LineageOS. The AOSP source code has also been used to adapt the software to a wider range of electronic devices, including game consoles, cameras, portable media players, smart TVs and PCs.

Screen (September 23, 2008-February 9, 2009)
Logo: On a black background, we see the white "android" on a sci-fi style font next to the Android logo, a green robot with two antennas and eyes. A white glow appears and disappears behind the logo during the loop.

Technique: Simple CGI.

Music/Sounds: None.

Availability: Seen on the earliest Android versions, those being 1.0 and 1.1 (aka Petit Four).

Screen (April 27, 2009-June 25, 2014 (end of production), October 2017 (extended support))
Logo: On a black background, we see the "android" text from the previous logo in silver. A shine then passes through the text during the loop.

Technique: Simple CGI.

Music/Sounds: None.

Availability: Seen on stock Android versions debuting with 1.5 (Cupcake), until 4.4.4 (KitKat).

Screen (November 4, 2014-)
Logo: On a black background, we see the "android" text in a more generic, curved-style font. Dark gray and white colors are seen wiping through the text during the loop.

Technique: Simple CGI.

Music/Sounds: None.

Availability: Seen on stock Android versions debuting with 5.0 (Lollipop). It is still used in recent versions.