Sorry for the silly question but is CaaS "Containers as a Service"? (I assume it is not Content as a Service: https://en.wikipedia.org/wiki/Content_as_a_Service)

If so, then the wikipedia disambiguation page (https://en.wikipedia.org/wiki/CAAS) redirects to a yet unwritten one:

https://en.wikipedia.org/wiki/Containers_as_a_Service

;)