SaaS, i.e., software-as-a-service, which first showed how software applications could be effectively made available as a service over the Internet, is undoubtedly a significant step towards cloud computing. But, initially, SaaS suppliers did not use “cloud” as a term to indicate their services. According to experts, SaaS is actually a subset of cloud computing. With SaaS, various other services that are available on the cloud can now be segmented into more types, namely, IaaS, or infrastructure-as-a-service, and PaaS, or platform-as-a-service. While IaaS facilitates remote access to servers and storage spaces, PaaS enables the development and deployment of web applications that are hosted on the cloud platform.