Everything As A Service
Service are great. You can sell a service.
And selling to you is what some people who talk about The Cloud are interested in doing.
Software As A Service
Offers the rental of an application over the web
Platform As A Service
Offers the rental of a container for a web application over the web
Infrastructure As A Service
Offers the rental of a computer system over the web
IaaS clouds make it very easy and affordable to provision resources such as servers, connections, storage, and related tools necessary to build an application environment from scratch on-demand.
Low cost, high performance IaaS offerings transformed the fortunes of PaaS and SaaS.
So What's New?
Offers such as these have been around for ages. So why is now the time to pay attention?
The rise of Utility Computing lies at the heart of the change. This allows IaaS vendors to offer dynamism and scalability through virtualisation on demand at low cost. The change has been driven by new players offering access to their existing infrastructure at marginal cost.
This in turn makes PaaS and SaaS in the Cloud newly interesting and cost effective.