At yesterdays IP EXPO 2010 I actually heard the “same” definition of the Cloud used in two different presentations !
- Cloud = IAAS + PAAS + SAAS
however with a subtle change I think it could be defined even more easily as
- Cloud = SAAS3 = SAAS + SAAS + SAAS
- SAAS = Systems as a Service instead of Software as a Service
- SAAS = Stacks as a Service instead of Platforms as a Service
- SAAS = Servers as a Service instead of Infrastructure as a Service