Final answer:
All listed options are recognized models of cloud computing, but Database as a Service (DBaaS) is a specialized category within IaaS or PaaS and thus might seem like the odd one out among the more generic models of IaaS, PaaS, and SaaS.
Step-by-step explanation:
To answer which option does NOT belong to the AWS Cloud Computing models, it's important to understand what each model represents. Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS) are all recognized models of cloud computing. Database as a Service (DBaaS) is also a cloud computing model, but it is more of a specialized category within IaaS or PaaS. While AWS offers relational and NoSQL databases as a service, DBaaS is not typically classified as a separate cloud computing model like the other three. Therefore, it might seem like the odd one out, but technically, it does fall under the broad umbrella of cloud computing services offered by AWS.