Cloud computing allows users to access computer data and programs over the internet rather than a local hard drive. It offers advantages like unlimited storage, increased reliability if files are not lost if a personal computer crashes, and easier collaboration between multiple users. However, it also has disadvantages like requiring a constant internet connection to access files and potential security and privacy issues if data stored in the cloud is unprotected or lost. Major players in cloud computing include Amazon Web Services, Microsoft Azure, Google, and IBM.

1. Welcome to the world of
cloud computing

2. CLOUD COMPUTING
INTRODUCTION:
Cloud computing is believed to have
been invented by Joseph Carl Robnett
Licklider in the 1960s with his work on
ARPANET to connect people and data
from anywhere at any time. However,
Kurt Vonnegut refers to a cloud "that
does all the heavy thinking for
everybody" in his book Sirens of Titan
(1959).

3. TYPES OF CLOUD COMPUTING

5. ADVANTAGES OF CLOUD
COMPUTING
Unlimited storage capacity:
Cloud computing offers virtually limitless storage.
Your computer's current 1 Tbyte hard drive is small
compared to the hundreds of Pbytes available in the cloud.
Increased data reliability:
Unlike desktop computing, in which if a hard disk crashes
and destroy all your valuable data, a computer crashing in
the cloud should not affect the storage of your data.
if your personal computer crashes, all your data is still out there
in the cloud, still accessible
In a world where few individual desktop PC users back up
their data on a regular basis, cloud computing is a data-
safe computing platform!

6. Easier group collaboration:
Sharing documents leads directly to better collaboration.
Many users do this as it is an important advantages of cloud
computing
multiple users can collaborate easily on documents and projects
Device independence.
You are no longer tethered to a single computer or network.
Changes to computers, applications and documents follow you
through the cloud.
Move to a portable device, and your applications and documents are
still available.

7. DISADVANTAGES OF CLOUD
COMPUTING
Requires a constant Internet connection:
Cloud computing is impossible if you cannot connect
to the Internet.
Since you use the Internet to connect to both your
applications and documents, if you do not have an
Internet connection you cannot access anything,
even your own documents.
A dead Internet connection means no work and in
areas where Internet connections are few or
inherently unreliable, this could be a deal-breaker.

8. Does not work well with low-speed connections:
Similarly, a low-speed Internet connection, such as
that found with dial-up services, makes cloud
computing painful at best and often impossible.
Web-based applications require a lot of bandwidth to
download, as do large documents.
Features might be limited:
This situation is bound to change, but today many
web-based applications simply are not as full-featured
as their desktop-based applications.
For example, you can do a lot more with Microsoft
PowerPoint than with Google Presentation's web-based
offering
+

9. Stored data might not be secure:
With cloud computing, all your data is stored on the
cloud.
The questions is How secure is the cloud?
Can unauthorised users gain access to your
confidential data?
Stored data can be lost:
Theoretically, data stored in the cloud is safe,
replicated across multiple machines.
But on the off chance that your data goes missing, you
have no physical or local backup.
Put simply, relying on the cloud puts you at risk if the cloud
lets you down.

10. EXAMPLE:Amazon Simple
Storage Service (S3)
Unlimited Storage.
Pay for what you use:
$0.20 per GByte of data transferred,
$0.15 per GByte-Month for storage used,
Second Life Update:
1TBytes, 40,000 downloads in 24 hours -
$200,

11. Cloud Storage Comparison-Annual Basis
Service
Provider
Free First Payment
tier
Second
Payment tier
Amazon 5GB 20GB ($10) 50GB ($25)
Apple iCloud 5GB 25GB ($40) 50GB ($100)
Box 5GB 25GB ($120) 50GB ($240)
Dropbox 2GB 100GB ($100) 200GB ($200)
Google Drive 5GB 25GB ($30) 100GB ($60)
Microsoft
SkyDrive
7GB 27GB ($10) 57GB ($25)
Mega 50GB 400GB ($120) 2TB ($240)

12. Core Advantages
Cost saving: You pay for what you use
Easy on installation and maintenance
Increased storage
Highly automated
Flexibility
Better mobility
Shared resources
Back up and restoration

13. Current Leaders
Key Players in Cloud Computing Platforms (adapted from Lakshmanan
(2009))
Company Cloud Computing
Platform
Year of Launch Key Offering
Amazon.com AWS (Amazon Web
Services)
2006 Infrastructure as a
service (Storage
Computing), Datasets
and Content Distribution
Microsoft Azure 2009 Application platform as a
service (.Net, SQL data
services )
Google Google App. Engine 2008 Web Application Platform
as Service
IBM Salesforce.com Blue Cloud Force.com 2008 Proprietary 4GL Web
application as an
demand platform

14. Working of cloud computing

16. conclusion
 Cloud Computing is in a period of strong growth, but this
technology is still has some issues of security and somewhat it is
immature. Government Technology Research Alliance (GTRA)
research showed that the most common concern about
implementing Cloud Computing technology was security.
 The real value of cloud computing is that it makes your library
related software and data available transparently and everywhere
including in latest available smart phone devices.
 We are all aware, country like India faced problems like digital
divide and off course very low internet bandwidth. So, benefit of
new technology can be reached to limited area of educational area.
 But definitely, over a period of time Cloud Computing will become
the most promising technology in next few years.