Colvine-Tech hardware (10 computers) are located in a single computer room and access to the room is permitted only to the few system users who have the required privileges. To access the computer…

Managerial controls are policies, procedures, and guidelines, not physical or logical access mechanisms like a door lock and PIN.

While a PIN has a technical aspect, classifying the doorlock and PIN together as 'technical' broadly describes their nature, but 'common' specifically describes how these controls are *applied* across multiple systems in this context.

System specific controls are unique to a particular information system, whereas these controls protect a shared environment for multiple systems.

Common security controls are implemented at an enterprise level and are inherited by multiple information systems or system components, meaning they are developed, implemented, assessed, and monitored once. In this scenario, the door lock and PIN secure the entire computer room that houses 10 computers, providing shared physical access control to all systems within. Thus, these controls are 'common' because they benefit multiple distinct systems collectively.