Cloud Computing refers to manipulating, configuring and accessing the hardware and software resources remotely. It offers online data storage, infrastructure and application. Cloud computing offers platform independency, as the software is not required to be installed locally on the PC. Example: AWS, Azure, Google Cloud. There are the following operations that we can do using cloud computing:

·         Developing new applications and services

·         Storage, back up, and recovery of data

·         Hosting blogs and websites

·         Delivery of software on demand

·         Analysis of data

·         Streaming videos and audios

In 2002, Amazon started Amazon Web Services, providing services like storage, computation and even human intelligence. However, only starting with the launch of the Elastic Compute Cloud in 2006 a truly commercial service opens to everybody existed.

Characteristics of Cloud Computing

·         Agility

·         High availability and reliability

·         High Scalability

·         Multi-Sharing

·         Device and Location Independence

Maintenance -Maintenance of cloud computing applications is easier, since they do not need to be installed on each user's computer and can be accessed from different places. So, it reduces the cost also.

Low Cost-By using cloud computing, the cost will be reduced because to take the services of cloud computing, IT company need not to set its own infrastructure and pay-as-per usage of resources.

Services in the pay-per-use mode- Application Programming Interfaces (APIS) are provided to the users so that they can access services on the cloud by using these APIs and pay the charges as per the usage of services.

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