According to Google+, it's Android's seventh birthday today. The social network celebrated by dropping three sweet wallpapers.

The wallpapers are more than just random visuals. The pastel-colored cupcakes and marshmallows remind us of Android's evolution through the years.

The candy illustrations come in lighter, darker and full-colored versions.

Taller than humans, figures of Android versions name inspirations Cupcake, Donut, Eclair, Froyo, Gingerbread, Honeycomb, Ice Cream Sandwich, Jellybean, KitKat, Lollipop and Marshmallow pop in the lawns of Google's California headquarters.

While, reports say that Google does not want to reveal the reason behind the sugary names stating, "It's kind of like an internal team thing," a smartphone salesman says Android pioneers Andy Rubin, Rich Miner, Nick Sears and Chris White love to eat desserts while developing the platform.

Marshmallow is the latest Android name. Android 6.0 Marshmallow is expected to roll out on Sept. 29 and Nexus 5 and 6 will be the first smartphones to boast the development. A statue of the Android robot holding a Marshmallow is up in the grounds of the Google headquarters since August.

Running on over a billion gadgets, Android is the most popular mobile device software.

Android started as a small separate company developing an advanced operating system intended for cameras. However, there were too few brands for the platform to grow into a powerhouse OS.

The founders realigned their vision and started developing a smartphone software that could recognize the gadget owner's preferences.

Rubin, Miner and White intended their invention to be an open-source OS, with tools that allowed developers to tweak the system as they pleased. When Google took Android under its wings in 2005, the vision was carried on.

In August 2008, a beta version of Android was released.

The first apps installed on Android were Messaging, Pictures, Camera, Alarm Clock, Calculator and Music. There was no Play Store at the time, and there were only three widgets: Picture Frame, Search and Clock.

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