IaaS is a form of cloud computing, which Amazon helped to create, that provides virtual computing resources online for the public. Crucially, this technology only charges customers for what they use.
The other two major cloud technologies include Platform as a Service (Paas) and managed private cloud services. PaaS allows customers to develop and manage its applications on the cloud meanwhile private cloud differs from the public service as it is dedicated to a single organization.
Amazon also powers ahead of its competitors in terms of market share in the PaaS sector though Microsoft, IBM and Salesforce collectively total slightly more than its AWS rival.
However, in the managed private cloud sector, IBM boasts a healthy lead over its next three rivals followed by Rackspace, NTT and AWS.