Android is growing rapidly, we can find almost all the mobile phone brands using this operating system, but many users do not know what it android. Android since it was first created on November 5, 2007 until now, has undergone several updates, the update that occurs, among other interfaces as well as additional features become more complete.

Here I will give a little knowledge of the android operating system. Android is a Linux based operating system for Smartphones and Tablet PCs. Android provides an open source platform / open source for developers to create their own applications.

At first Android is owned company called Android, Inc. In 2005 by bought Google Inc. and was released in 2007 formally, which coincides with the founding of the Open Handset Alliance, a consortium of telecommunications companies, software, and hardware that aims to promote open standards mobile devices.
HTC Dream

The first phone to use Android was the HTC Dream, which was released on October 22, 2008. There are currently several versions of the Android OS that is used in mobile phones with bebrbagai brand, following the various versions of the Android OS:

Android Alpha
Released in early 2007, is an operating system in a formal testing process and in the stage setting features such as bugs and crashes in the system. Its resources are still bad, and yet functional.

Android Beta
Released in November 2007, is the first commercial version is still in the stage of the development cycle and is still in the aspect of the trial. It took a lot to be optimized, its still not optimal, especially in terms of interface and graphics.

Android Version 1.0 (Angel Cake)
Released on September 23, 2008. This is an ongoing Android developed by Google and the Open Handset Alliance (OHA). From this Android OS started giving extraordinary expectations. Open source OS is the world's first mobile provided by the manufacturer, code developers to be more creative with the design of the user interface, widgets and applications, but has yet to show a significant development, because there is still a lot of fans who are interested. At this stage, Google has an obsession with giving each OS release with name-based cake.

Android Version 1.1 (Bettenberg)
Released February 9, 2009. This KLI desserts using the name as a nickname, call Android 1.1 Battenberg. This version update does not bring a lot of new features, just a few tweaks here and there and fixes a few bugs, but overall better performance.

Android Version 1.5 (Cupcake)
Release 30 April 2009, Android began to feel its development. Features Android Cupcake enough to make the attention of so many people who start using it. Cupcake Android Operating System, based on the Linux kernel 2.6.27. Android Cupcake is an early release that uses the name of sweet food.

Version: 1.5
Linux Kernel: 2.6.27
1. Bluetooth A2DP
2. Features copy and paste in browser
3. Screen transition animations and the option of auto-rotation
4. Support for third-party
5. The ability to upload photos and videos
6. Video recording and playback

Android Version 1.6 (Donut)
Released 15 September 2009, Donut comes with many additional features including Google Maps with turn-by-turn navigation. Android Market becomes an easy place to shop applications.

Android Donut is the version that shows the world of information right at your fingertips, search the web, get directions, and watch video. An operating system based on Linux kernel 2.6.29, shows a variety of new features.

Version: 1.6
Linux Kernel: 2.6.29
1. Gallery which features more user friendly
2. Increased speed in searching
3. Multi-language system
4. Support for WVGA screen resolutions
5. The camera becomes faster and more integrated
6. Voice and text input enhanced search

Android version 2.0 (Eclair) October 26, 2009
Android Version 2.0.1 (Eclair) December 3, 2009
Android version 2.1 (Eclair) January 12, 2010

Released with version 3, but with the first name in the not too distant future, Android Enclair focus more on hardware optimization as seen from not too many key features. Based on Linux kernel 2.6.29, introducing other features.

Version: 2.0, 2.0.1, 2.1
Linux Kernel: 2.6.29
1. Ability show pop-ups for calls, SMS and email
2. Google Map application that improved
3. Live wallpapers and animations, multi-touch
4. Speed optimized hardware
5. Sync accounts, contacts quickly, Bluetooth 2.1
6. The camera has support features 3.2 Mega Pixel (MP) flash, digital zoom, scene modes, color balance, color effect, and macro focus

Android version 2.2-2.2.3 (Froyo)
    Released May 20, 2010, Android Froyo is short for Frozen Yogurt is equipped with Adobe Flash 10.1. Speed performance was already 3 to 5 times faster than before. Android is based on Linux kernel version 2.6.32.

    Android 2.2 Froyo has significant system performance improvement over version of Eclair. Storage access and applications such as Web browsers increased faster.

Version: 2.2, 2.2.1, 2.2.2, 2.2.3
Linux Kernel: 2.6.32
1. Auto Update in the Android Market
2. Enhanced browser capabilities
3. Enhanced security features
4. Function USB tethering and Wi-Fi hotspot
5. HD Quality Video
6. Speed, memory, and performance improved
7. Storing application in the MMC / SD Card
8. Support for Adobe Flash 10.1
9. Support Password figures and unique character

Android version 2.3-2.3.2 (Gingerbread) December 6, 2010
Android Versions 2.3.3-2.3.7 (Gingerbread) February 9, 2011

Android Gingerbread also has two versions, Google introduced NFC (Near Field Communications) technology which will allow users to make mobile payments to receive information and free stuff. Quality and performance are optimized Android Gingerbread on features such as games, audio, video, camera, and copy and paste functions of its implementation. Android is based on Linux kernel version 2.6.35.

Android Gingerbread has the function of the sensor is more accurate, and accuracy of text input keyboard increases, text copying function is selected, audio effects such as virtualization headphones and front camera support.

Version: 2.3, 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.3.5, 2.3.6, 2.3.7
Linux Kernel: 2.6.35
1. App Control
2. Display Interface simpler and increased speed
3. Internet contacts integrated into the user's phone book
4. Power Management
5. Supports large screen
6. Supports multi camera
7. The sound effects, equalizer, and virtual
8. User Interface energy saving
9.Virtual keyboard is much faster and intuitive

Android version 3.0 (Honeycomb) February 22, 2011
Android version 3.1 (Honeycomb) May 10, 2011
Android version 3.2 (Honeycomb) July 15, 2011

Released February 2, 2011, a version of which is devoted to the tablet device. Changes made on Android Honeycomb which is quite large, it is intended that the look of Android Honeycomb seem more elegant and professional. One application of this version is the Built-in Video Calling Google Talk that make communication smooth. Android is based on Linux kernel 6.2.36.

In addition to the visual differences Android Honeycomb introduces hardware acceleration and support for multi-core processors.

Version: 3.0, 3.1, 3.2, 3.2.1, 3.2.2, 3.2.3, 3.2.4, 3.2.5, 3.2.6
Linux Kernel: 2.6.36
1. Acceleration performance of the device
2. Expansion screen support API
3. Load media files directly from the SD card
4. Supports external keyboard, joystick
5. The ability to display a full-screen album
6. The new keyboard design, faster and more accurate
7. Quick access to the camera features
8. "Zoom-to-fill" compatibility mode screen

Android versions  4.0-4.0.2 (Ice Cream Sandwich) October 19, 2011
Android Versions 4.0.3-4.0.4 (Ice Cream Sandwich) December 16, 2011

    Android This version is the first output of Android that has features face recognition unlock degan. Appearance interface is clean and soft make the user comfortable and satisfied degan quality. Android Ice Cream Sandwich has a font that is simple and elegant yet unique enough, his name is Roboto font. You can also resize widgets as you wish. Android is based on Linux kernel 3.0.1.

Version: 4.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4
Linux Kernel: 3.0.1
1. Ability to access the application directly from the lock screen
2. Automatic synchronization on the browser
3. Photo Editor and finer color screen
4. Stable performance and better camera app
5. The integration of voice, face detection unlock

Android version 4.1 (Jelly Bean) July 9, 2012
Android version 4.2 (Jelly Bean) 13 November 2012
Android version 4.3 (Jelly Bean) July 24, 2013

Android version 4.1 operating system has a feature that has been refurbished as, search using Voice Search is fast, accurate weather information, features a virtual keyboard is better, has sufficient battery life savers, and others. The next version of Android 4.2, has a lightweight operating system and fast, Technology Project Butter which works to improve responsiveness is excellent, Full Chrome Browser to surf the Internet, so users can wear it like on a computer. Another feature that is updated Notifications, Smart Widget, Google Now, Google Assistant, Barrel Roll, as well as Face Unlock degan Liveness Check. Android Jelly Bean 4.3 version is more focused on minor updates. Having the support of Multi-User Profiles degan Restricted, so as to control the full use of the application is available for user profiles that users create. Bluetooth Smart power saving, supports Open GL ES 3.0, the performance of the graphics are cool and look more realistic, supports DRM Framework. Android is based on Linux kernel 3.0.31.

Android Jelly Bean is an additional renewal with the main goal of improving the function and performance of the user interface, using a touch of anticipation, triple buffering. In this operating system has a focus on performance, introducing vertical synchronization (Vsync) to improve the graphics.

Version: 4.1, 4.1.1, 4.1.2, 4.2, 4.2.1, 4.2.2, 4.3, 4.3.1
Linux Kernel: 3.0.31
1. Security features
2. Improved System Performance
3. Supports Bluetooth with little energy
4. Supports emoji 

Android Version 4.4 (KitKat)
Released October 31, 2013, in this version of android is getting better and more sophisticated, as seen from the icon design is unique, the SMS feature that terintgrasi directly into the Google Hangouts, navigational status bar degan new look, facilities Could Printing, Interface refined, capable access the camera app from a locked screen, listen to voice commands of the Google Now.

Android 4.4 KitKat start the system on Google Nexus 5 in October 2013, and is optimized to work at a greater range than previous versions of Android devices.

Version: 4.4, 4.4.1, 4.4.2, 4.4.3, 4.4.4
1. Features Built-In Screen Recorder
2. Improved features auto-focus camera
3. Improved protection and security
4. Improving the ability of the application

Android Version 5.0 (Lollipop)
Released October 15, 2014, the latest stable version of the Android operating system developed by Google. The changes that stand out in this version of Lollipop is a redesigned user interface and built-in design which is referred to as "material design". Improvement notices, which can be accessed by users from the lockscreen and displayed on the top screen. Google also made internal changes to the platform, with Android Runtime (ART) to improve application performance, and to improve and optimize battery usage.

Lollipop Android 5.0, was unveiled in June 2014, officially as an update is available over-the-air (OTA) November 2014, features a redesigned interface, built with responsive design, which was followed the next version.

Version: 5.0, 5.0.1, 5.0.2, 5.1, 5.1.1
1. Improved interface screen display
2. Improved notification system
3. Improved Screen Lock
4. The addition of multi-language

Android Version 6.0 (Marshmallow)
Released 30 September 2015, Android Marshmallow offer some new form of Android security patch level followed by a description, date, features quick access to menu pengendaian by voice, Google also improve the appearance of the animated notification, batteries more efficient with mode "doze", features Now On Tap , to improve the ability of Google Now.

Marshmallow Android is the next major version of the operating system Android. First introduced in May 2015 with the code name of Android M, was officially released in October 2015.

Android Marshmallow focuses primarily on improving the overall user experience of a version of Lollipop, introduces a new architecture, including contextual help, system power management by reducing the activity of the background when the device is not physically used, native support for fingerprint recognition, and USB, the ability to migrate the data and applications to a microSD card and use it as a main storage, as well as other internal changes.

Version: 6.0, 6.0.1
1. Archives larger applications
2. Back-up full automatic data
3. Features applications stand-by
4. Fingerprint Screen Lock

Android Version 7.0 (Nougat)
Released in mid 2016. Android Nougat is the latest operating system which introduces important changes to the platform and development, including the ability to display multiple applications on the screen at once in a split-screen view, support for counter notification, as well as neighborhood-based "OpenJDK Java" and support for graphic rendering "Vulkan API", and seamless system updates on supported devices.

Version: 7.0
1. Color calibration capabilities.
2. Improved features of the application.
3. Instant application, quick settings.
4. Support for the latest virtual reality platform Google
5. Supports multi-screen.
6. The new design of the display interface.

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