Cloud computing offers three different kinds of services. Depending on clients' necessities, each form of cloud service is used either independently or in together with others. Three kinds of cloud facilities is briefly describing here:
First one is “Software as a service” which is shortly known as SaaS. Also SaaS is well-known as "on-command software". Rather than the clients of SaaS completely purchasing the certificate of some different software charges the software occasionally as well as uses them by a browser. Also the diversity of software through available by “Software as a service” is huge. There are many software’s brought by SaaS applied in businesses that provide content management, ERP, human source organization, accounting, user association management as well as some other related areas. This kind of cloud service is increasing very quickly while the main market for SaaS is user relationship management.
Second one is known as “Platform as a Service”. It offers computing stages to the clients of cloud. It creates the connection between the SaaS and IaaS services of cloud computing. A typical computer needs a computing stage that contains hardware architecture with a structure of software. And the platform consists of the computer's working system, design and languages. Therefore, when it proceeds to cloud, in the nonappearance of a genuine PC, it’s a Service to provide the clients with everything that is need to create a platform. A number of services that PaaS presents consist of hosting, operation, testing, application improvement as well as deployment. Moreover, cloud service suppliers offering many features to test, propose, install, host and start applications. But all services can be achieved by any person and business users by fixing to a particular package.
Last one is "Infrastructure as a Service" which is shortly known as IaaS. It is the last and third form of computing using the cloud. IaaS carries a virtualized stage. But the procedure of virtualization displays the users just the conceptual computing stage in place of the physical aspects. This virtualization causes the creation which is identified as 'hypervisor' or 'practical engine monitor'. It also enables the formation of the last component of cloud. Also the rate charged by cloud suppliers is not fixed. It counts on the total action completed by the cloud user. There are many benefits of applying this cloud computer equipment. However, all kind of cloud service appears with their set of problems and mainly advantages. But to make correct choice, it is very important that users consider these reasons carefully.