In cybersecurity, a system of reference refers to a structured framework or set of standards used to consistently describe, categorize, and analyze security events, threats, or assets. It provides a common language and context for security professionals to communicate findings, assess risks, and implement controls. By establishing a shared understanding, a system of reference ensures that different teams and tools interpret security data uniformly, reducing confusion and improving incident response. Examples include taxonomies for classifying cyber threats or standardized models for network architecture. Adopting a system of reference is essential for effective collaboration, compliance, and the development of robust cybersecurity strategies.