Rapid elasticity: The ability of a cloud system to quickly scale up or down in response to changes in demand or usage. It is used in cloud computing to ensure that a system has the necessary resources to handle sudden increases in traffic or workload without affecting performance or availability. Examples include auto-scaling, load balancing, and resource allocation.

Raw Disk Storage: Storage access mode where the operating system and applications interact directly with the disk sectors, bypassing typical file system structures. This provides finer control over the data storage and retrieval process, utilized in scenarios requiring tailored data management, such as certain database systems or specialized data processing applications.

Read: The act of accessing and retrieving data from a storage location. It is used in computing to access information from a variety of sources, including memory, disk, or network. Examples of reading include accessing a file on a computer's hard drive or reading data from a database.

Read Access: The permission to access and retrieve data from a storage location. It is used in security to control who can access sensitive information. Examples of read access include allowing only certain users to view sensitive financial data or restricting access to confidential documents.

Real User Monitoring (RUM): A performance measurement technique that tracks the user experience of a website or application in real-time from the user's perspective. It is used in web development and user experience design to identify and diagnose performance issues, such as slow page loads, errors, or crashes. Examples include using RUM tools to monitor the end-to-end user journey, including the network, server, and browser components, and using RUM data to identify and optimize performance bottlenecks or user pain points.

Reasonable actions: Actions that are considered appropriate given the specific circumstances and are based on common sense and sound judgment. It is used in information security to determine the necessary measures that need to be taken to protect data and systems from potential threats. Examples include implementing multi-factor authentication, conducting regular security assessments, and implementing robust access controls.