This document discusses tablets and their operating systems. It provides details about Android, the most popular mobile OS, including that it is based on Linux and powers hundreds of millions of devices globally. It also discusses processors and how they carry out basic instructions to operate devices, using silicon chips that can contain thousands of components and transistors as small as 60 nanometers. Moore's Law about processing power doubling every couple years is also mentioned.

1. ANDROID
&
PROCESSOR
B.M.ADARSHA
07
N
TE

2. A tablet computer, or simply a tablet is a one
piece mobile computer.
Available in variety of sizes tablets
customarily offer a screen diagonal more than
7”(18cm), differentiating themselves through
size from functionally similar smart phones or
personal digital assistants.
Tablet personal computers are mainly based
on the x86 IBM-PC architecture and fully
functional personal computers employing a
slightly modified personal computer OS(such
as Windows or Linux) supporting their touch
screen, instead of a traditional display, mouse
and keyboard.

3. Tablets have also appeared in foldable Booklet
format that offer the user dual touch screens, and
can be used as a notebook by displaying a virtual
key board on one of the displays.
A typical tablet personal computer needs to be
stylus driven, because operating the typical
desktop based OS requires a high recession to
select GUI widgets, such as a close window
button.
OPERATING SYSTEMS IN TABLET
1. Android
2. Blackberry OS
3. Ios
4. Linux
5. Windows

4. • Android is the world's most popular
mobile platform
Android powers hundreds of millions of mobile
devices in more than 190 countries around the
world. It's the largest installed base of any mobile
platform and growing fast—every day another
million users power up their Android devices for
the first time and start looking for apps, games,
and other digital content.
Android gives you a world-class platform for
creating apps and games for Android users
everywhere, as well as an open marketplace for
distributing to them instantly.

5. • A processor is the logic circuitry that responds
to and processes the basic instructions that drive
a computer
• The processor is the component that physically
tells these devices what to do and when to do it.
THE JOB
• Though the processor is the key to very
complicated devices, what it physically does is
actually very simple. It carries out a few simple
instructions that tell whatever device it is
embedded in how to work.

6. The most amazing feature of processing chips
is how small they are. The side of a chip can be
up to 1 inch long, but the chip itself can contain
thousands of components. The material used to
make the chip is silicon, sliced wafer-thin.
The physical composition of silicon makes it the
perfect material on which to build the circuits
that make up a processor chip. Using laser
light, the circuit design is etched onto the
surface of the silicon. Once drawn, the
transistor portions, or wiring, are built onto the
chip. The spacing between transistors can be
as narrow as 60 nanometers, which is just a

7. • Boolean logic is the processing language used by
the chip to communicate bits of
information throughout the computer. In its simplest
form, Boolean logic uses a two-value logic system of
"true" and "false" to translate electrical currents into
information that can be used by the system.
As technology becomes more advanced, the
processor chip continues to decrease in size. The
compartmentalizing of processor capabilities means
reduced cost and greater efficiency.
As such, nanotechnology explorations are well on
their way. Current research attempts are focusing on
applying the processor chip model on the molecular
level. Once achieved, the speed and efficiency
standards we see today become painfully slow by
will comparison.

8. Intel’s cofounder, Mr. Gordon Moore, predicted that
the processing power could be doubled every 18-
24 months. This is measured by doubling the
transistor counts in a microprocessor. This
prediction is now known as Moore’s Law.
Pn = Po × 2n
Where
Pn = processing power in future years
Po = processing power in the beginning year

9. n = number of years to develop a new
microprocessor divided by 2, i.e., every two years

10. In 1988, the number of transistors in the Intel 386
SX microprocessor was 275,000. What were the
transistor counts of the Pentium II Intel
microprocessor in 1997?
SOLUTION: If Intel doubles the number of transistors
every two years, the new processor would have
Pn = 275,000 × 2n (where n = 9/2 = 4.5)
= 275,000 × 22.63
= 6.2 million transistors
In 1997, the Pentium II had 7.5 million transistors.
In other words, in the last 9 years, Intel has been
doubling the number of transistors in its
microprocessors in less than every two years.

11. COMPUTER SCIENCE
Android is an OS based on Linux. Hence, deep
inside, Android is pretty similar to Linux.

12. The diagram shows four basic apps (App 1, App 2,
App 3 and App 4), just to give the idea that there can
be multiple apps sitting on top of Android.
Scratching further below the applications, we reach
the application framework, which application
developers can leverage in developing Android
applications.
The framework consists of certain entities; major
ones are:
1. Activity Manager
2. Notification Manager
3. Views
4. Resource Managers
5. Content Provider

13. Libraries
This layer holds the Android native libraries.
Android Runtime
The Android runtime consists of the Dalvik Virtual
Machine. It is basically a virtual machine for
embedded devices, which like any other virtual
machine is a bytecode interpreter.
Kernel
The Android OS is derived from Linux Kernel 2.6 and
is actually created from Linux source, compiled for
mobile devices. The memory management, process
management etc. are mostly similar. The kernel acts
as a Hardware Abstraction Layer between hardware
and the Android software stack.

14. ENGINE TESTING USING TORQE
ANDROID APPLICATION
Technical information about an engine while running
can be viewed with the help of an android tablet
application called torque
A Bluetooth OBD2 adapter is connected t diagnostics
socket on the car and paired to a tablet via Bluetooth
containing the torque app.
Torque is a vehicle/car performance/diagnostics tool
and scanner that uses an OBD2 Bluetooth adapter to
connect engine management/ECU.
The app needs Bluetooth OBD2 adapter to work.
The adapter is small and plugs into the diagnostic
socket on the car which gives your phone access .

15. The adapter is small and plugs into the diagnostic
socket on the car which gives your phone access
Work on any vehicle that uses the OBD2 standard if
in check with your manufacturer first look for ‘OBD2’
on written on a big white label in your engine.