Today we do not need hard drives to store data as cloud computing services have replaced the hard drive technology. Cloud computing refers to the availability of computer system resources without direct active management by the user. Cloud services can fulfill all our IT needs. There are a few companies that provide cloud computing services and are usually called cloud computing services providers. They charge users for their services which depend on the service acquired. Some of the top cloud computing companies are Amazon Web Services, Microsoft Azure, Google Cloud Platform and IBM Cloud. Generally, cloud computing services are categorized into three types: Infrastructure as a Service, Platform as a Service and Software as a Service. It is said that cloud computing enables individuals and small businesses to set-up enterprise-class services.