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Android is not a robot as one might think, it is a comprehensive platform for mobile device (phone, PDA, netbook, etc). 
It consists of an operating system, libraries "middleware" and a set of applications: mail client, browser, calendar, etc.. Android is based on Linux kernel. Libraries "middleware" that are composed written in C / C + +. The Framework is itself written in Java.
Android was developed by the OHA (Open Hanset Alliance), an international alliance of company. This alliance consists of company is not part of the same sector.
And it consists of:

  • mobile operator (Vodafone, Teleponica, Telecom Italia, China Mobile, etc.)
  • mobile phone manufacturers (Asus, HTC, LG, Motorola, etc.).
  • semiconductor manufacturers (Intel, Nvidia, ARM, etc.).
  • software editors (Ebay, Google, PacketVideo, etc.).
  • distributors (Aplix Corporation, Borqs, TAT)

Today there are 1.5 billion televisions worldwide. 1 billion people have internet access. But nearly 3 billion people have a mobile phone, so that the mobile phone is the product knowing the most successful in the world. This is why the OHA is launched on the mobile sector. They hope to provide innovative and effective mobile platform providing users with a new experience of using their mobile phone.

          STARTING ANDROID 1.0

For the most part, Android 1.0 established the general design for the operating system, remaining a constant throughout each major iteration, pre-Honeycomb. The launcher and icon layout should be familiar to just about every Android user.
One of the most notable features of Android 1.0 was the pull-down notification bar. As most know, this allows users to view, and occasionally get a preview of, e-mails, text messages and so on. In addition, the original Android OS introduced Google Sync, essentially pulling together your contacts and calendar information from your Google account on your phone.
The multiple homescreen format was also introduced, a key feature in every version of the OS, as well as Widgets for extremely handy at-a-glance information. The Android Market was also available since the first iteration of the operating system.

Android 1.5 cupcake


Starting the time  of Android OS versions being titled after sweets, in alphabetical order. Copy/paste functions were finally introduced to the browswer and camera functionality was finally included. The option for alternate keyboard input methods was implemented, giving birth to apps like the ever-handy Swype. Useful considering this was the first version of the operating system that supported on-screen keyboards.
ANDROID 2.2 :Froyo

With FroYo came the introduction of the Nexus line of smartphones. These devices were co-created by Google to provide the most pure Android experience, complete with timely operating system updates.
USB tethering, mobile hotspot and Adobe Flash support was included, as was the ability to finally update apps from the Android market automatically. A number of system enhancements were also in place, improving the overall performance of the operating system.

             ANDROID 2.3 Gingerbread

Based on Linux Kernel
Confirmed new features of 2.3 (Gingerbread):
•    Support for WebM video playback
•    Support for Near Field Communication
Unconfirmed new features:
•    Improved copy–paste functionalities
•    Improved social networking features
•    Android Market music store
•    Media streaming from PC library
•    Revamped UI
•    Support for bigger screens with up to Wide XGA (1366×768) resolution
•    New 3D Games support including new Marketplace area for gaming

•    Use of mksh for /system/bin/sh
•    Support for video call. for WebP image files also for Google TV.  
 Motorola began issuing the Android 3.2 (Honeycomb) update to Wi-Fi XOOM owners on Tuesday. The patch reportedly adds support for the tablet’s SD card slot and also features a new screen zooming feature that will allow users to resize mobile applications so that they fit the screen appropriately. Android 3.2 will also add support for smaller tablets with 7-inch screens, many of which currently run older versions of Android such as Gingerbread

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