This presentation for Android Operating System. I have added all android versions release date and also added architecture of android OS. You can use this ppt for your college seminar presentation. Thank you...

1. Android Technology
Presented By:
Keshav Kunthe
(MCA IIIrd Year)

2. Introduction
 Android is a Operating System.
Design for Smartphones.
Based On Linux Kernel.
User Interface Base On Touchscreen.
Multitasking.
 Initially developed by Android.

3. History
 Android found in October 2003.
Palo Alto, California.
Andy Rubin, Rich Miner, Nick Sears and Chris White.
 Android was purchased by the Google in August, 2005.
 $ 50 million.

4. Architecture

5. Applications
 You can install app on this layer.
 Android provides a set of core applications:
 Email Client
 SMS Program
 Calendar
 Maps
 Browser
 Contacts
 All applications are written using the Java language.

6. Application Framework
 This framework is used by Developers.
 Provides Higher-level Services.
 Enabling and simplifying the reuse of components.
 Developers have full access to the same framework.
 APIs used by the core applications.

7. Libraries
 WebKit Open Source Library.
 SQLite Database.
 SSL library for Internet Security.
 Media Framework For Media Formats.

8. Android Runtime
 Dalvik Virtual Machine.
 Run its own Process.
 Core Libraries.
Java language.
APIs
 Data Structures
 Utilities
 File Access
 Network Access
 Graphics.

9. Linux Kernel
 Linux Kernel 2.6 for core system services
 Memory and Process Management
 Audio Drivers.
 Power Management.
 Security.
 Bridge between the H/W and S/W stack

10. Platforms
Smartphone Tablet Smart watchConsole

11. Android Version’s
1. Alpha / Astro
2. Beta (1.0)
3. Cupcake (1.5)
4. Donut (1.6)
5. Eclair (2.0 – 2.1)
6. Froyo (2.2 – 2.2.3)
7. Gingerbread (2.3 – 2.3.7)
8. Honeycomb (3.0 – 3.2.6)
9. Ice Cream Sandwich (4.0 – 4.0.4)
10. Jelly Bean (4.1 – 4.3)
11. KitKat (4.4)
12. Lollipop(5.0–5.1.1)
13. Marshmallow(6.0–6.0.1)

12. Android Alpha
 Google and the OHA. (September 23,2008)
 Web Browser Support.
 Map with street view.
 Media Support, Bluetooth, Text Message Support.
Android Beta
 Released on February 9, 2009.
 First Public/Commercial version Android OS.
 HTC Dream with Android 1.0.
 Android Market, Google Services, Wireless Functionality etc.

13. Android Cupcake
 Released on 27 April 2009, Android 1.5.
 Homescreen Widget support.
 Video Recording and Playback.
 Auto Rotation option.
Android Donut
 Released on 15 September 2009, Android 1.6
 Support for CDMA, WiFi, VPN services.
 Voice to Text.

14. Android Eclair
 Released on 26 October 2009, Android 2.0
 Search All SMS or MMS.
 Bluetooth 2.1 Support.
 Web Browser with HTML 5 support.
Android Froyo
 Released on 20 May 2010, Android 2.2
 Install Apps On External Storage.
 Wi-Fi Hotspot Functionality.
 Adobe Flash Player Support.

15. Android Gingerbread
 Released on 6 December 2010, Android 2.3
 Support Extra Large Screen Resolution.
 Sensors such as Accelerometer.
 Support for Voice and Video Chat
Android Honeycomb
 Released on 22 February 2011, Android 3.0
 First Tablet version.
 Simplified Multitasking.
 Resize home screen widgets.

16. Android Ice Cream Sandwich
 Released on 18 October 2011, Android 4.0
 Built-in photo editor.
 Screenshot Capture Functionality.
 WiFi Direct support.
Android Jelly Bean
 Released on 9 July 2012, Android 4.1
 Turn off Notification.
 Support 5.1 Audio Channel.
 Full HD Resolution Support.

17. Android KitKat
 Released on 3 October 2013, Android 4.4
 White elements instead of blue.
 Wireless Printing.
 Optimizations for Low RAM devices
Android Lollipop
 Released on 12 November 2014, Android 5.0
 New UI Added.
 Access Application when screen is lock.
 Flashlight application on Notification.

18. Android Marshmallow
 Released on 5 October 2015, Android 6.0
 App Standby Feature.
 Google Now On Tap Feature.
 DND Mode Added.
 Fingerprint Support.
 Double Tap power button Open Camera.
 Automatic Full Data Backup.

19. Conclusion
 Access from the Root of Android Operating System.
 Customizations of ROM (General Features, User Interface and Kernel).
 Wide range of Hardware availability.
 Unofficial Development support.
Advantages
Disadvantages
 Advertisement when using Apps.
 Cheap low end devices.
 Worse Battery Life.

20. Thank You…