The United States has a myriad of regulations focused on specific types of data, such as healthcare and financial, but lacks an overall comprehensive privacy law on the national level. The European Union, the Asian- Pacific Economic Cooperation, and Russia all have national privacy protections and regulations for the handling the PII data of their citizens.

Baselines are a set of configurations and policies applied to all new systems or services, and they serve as the basis for deploying any other services on top of them. Although standards often form the basis for baselines, the term is applicable in this case. Hardening is the process of securing a system, often through the application of baselines. Leveling is an extraneous but similar term to baselining.

JavaScript Object Notation (JSON) and Extensible Markup Language (XML) are the most commonly used data formats for the Representational State Transfer (REST) API and are typically implemented with caching for increased scalability and performance. Extensible Markup Language (XML) and Security Assertion Markup Language (SAML) are both standards for exchanging encoded data between two parties, with XML being for more general use and SAML focused on authentication and authorization data. HTML is used for authoring web pages for consumption by web browsers

Explanation
Within IaaS, the number of users on a system is not relevant to the particular hosting model in regard to cloud resources. IaaS is focused on infrastructure needs of a system or application. Therefore, a factor such as the number of users that could affect licensing requirements, for example, would apply to the SaaS model, or in some instances to PaaS.