Android
Android is a Linux-based operating system designed primarily for touchscreen mobile devices such as smartphones and tablet computers. This system is developed by Google.


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Every day more than 1 million new Android devices are activated worldwide. Easily optimize a single binary for phones, tablets, and other devices.


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you can search and install thousands of free applications from google play store. these applications are games , software , radio , tv channels , photo editors , 3d games , game emulators , web browsers and what not.........
so this is the main fun with android , you can install any thing you want.


Multitasking

The Recent Apps button lets users jump instantly from one task to another using the list in the System Bar. The list pops up to show thumbnail images of apps used recently — tapping a thumbnail switches to the app.

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A device that detects the physical movements of the tablet. This allows greater flexibility of use since tablets do not necessarily have a fixed direction of use. The accelerometer can detect the orientation of the tablet relative to the horizontal plane, and movement of the tablet, both of which can be used as an alternative control interface for a tablet's software.


 


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New home screen folders offer a new way for users to group their apps and shortcuts logically, just by dragging one onto another. Also, in All Apps launcher, users can now simply drag an app to get information about it or immediately uninstall it, or disable a pre-installed app.


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Widgets let users check email, flip through a calendar, play music, check social streams, and more — right from the home screen, without having to launch apps. Widgets are resizable, so users can expand them to show more content or shrink them to save space.


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The lock screens now let users do more without unlocking. From the slide lock screen, users can jump directly to the camera for a picture or pull down the notifications window to check for messages. When listening to music, users can even manage music tracks and see album art.

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When an incoming call arrives, users can now quickly respond by text message, without needing to pick up the call or unlock the device. On the incoming call screen, users simply slide a control to see a list of text responses and then tap to send and end the call.


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Face Unlock is a new screen-lock option that lets users unlock their devices with their faces. It takes advantage of the device front-facing camera and state-of-the-art facial recognition technology to register a face during setup and then to recognize it again when unlocking the device.


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This system gives the user more visibility over the power being consumed by system components and running apps. The Application settings provides an accurate overview of how the battery is being used, with details of the usage and relative power consumed by each component or application.


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Writing messages on the go is easier than ever with Gesture Typing – just glide your finger over the letters you want to type, and lift after each word. You don’t have to worry about spaces because they’re added automatically for you.


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When taking pictures, continuous focus, zero shutter lag exposure, and decreased shot-to-shot speed help capture clear, precise images. Stabilized image zoom lets users compose photos and video in the way they want, including while video is recording. For new flexibility and convenience while shooting video, users can now take snapshots at full video resolution just by tapping the screen as video continues to record.


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The Android Browser offers an experience that’s as rich and convenient as a desktop browser. Users can set their preference for web sites separately for each browser tab.


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In Android 4.0, users can see how much network data their running apps are using. They can also set limits on data usage by network type and disable background data usage for specific applications.


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These are the versions of android system:
Eclair
Froyo
Gingerbread
Honeycomb
Ice Cream Sandwich
and the latest one is 4.2 named as Jelly Bean

Jelly Bean is the fastest and smoothest version of Android yet. Everything in Jelly Bean feels fast, fluid, and smooth. It has faster orientation changes, faster responses when switching between recent apps.


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Companies that support Android System
Sasmsung, HTC, Sony, Q-Mobile, LG, Huawei, ZTE


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