how android came into exist and how it works and what are the till now versions of it. ALL at one place

2. History
• Android, Inc. was founded in Palo Alto, California in October 2003 by
Andy Rubin ,Rich Miner ,Nick Sears and Chris to develop "smarter mobile
devices that are more aware of its owner's location and preferences"
• In July 2005, Google acquired Android Inc. for at least $50 million.
• On November 5, 2007, the Open Handset Alliance, a consortium of
technology companies including Google, HTC, Sony and Samsung and
chipset makers such as Qualcomm unveiled itself, with a goal to develop
open standards for mobile devices. That day, ANDROID WAS UNVEILED
AS ITS FIRST PRODUCT, a mobile device platform built on the LINUX
KERNEL.
• The first commercially available smartphone running Android was the
HTC Dream, released on October 22, 2008

3. The First Android Phone HTC dream

4. Founder of ANdroid Inc.

5. versions

6. What is Android ?
• Android is a mobile operating system developed by Google
• based on the Linux kernel and designed primarily for touchscreen
mobile devices such as smartphones and tablets
• Android has been the best selling OS on tablets since 2013

7. Features
• Interface
Android's default user interface is mainly based on direct manipulation,
using touch inputs that loosely correspond to real-world actions, like swiping,
tapping, pinching, and reverse pinching to manipulate on-screen objects,
along with a virtual keyboard.

8. Applications ("apps"), which extend
the functionality of devices.(gmail
app) .
• Application

9. • Memory management
Since Android devices are usually
battery-powered, Android is
designed to manage processes to
keep power consumption at a
minimum.

10. Linux Kernel
• Android's kernel is based on one of the Linux kernel's long-term support (LTS)
branches. Since April 2014, Android devices mainly use versions 3.4, 3.10 or 3.18
of the Linux kernel. LINUX kernel modified and added features such as the
inclusion of components like Binder, ashmem, pmem, logger, wakelocks, and
different out-of-memory (OOM) handling.
• The flash storage in Android device is split into two partitions such as /system
for OS itself and /data for user data
• Android device owners are not given root access to the operating system and
sensitive partitions such as /system are read-only. However, root access can be
obtained by exploiting security flaws in Android, which is used frequently by the
open-source community to enhance the capabilities of their devices, but also by
malicious parties to install viruses and malware.

11. Architecture

12. security
• Android applications run in a sandbox, an isolated area of the system that does
not have access to the rest of the system's resources, unless access permissions
are explicitly granted by the user when the application is installed.

13. Android is just
a cover of
linux