Security
From physical location to computer systems
Security is the set of measures between your organization's most important assets and the people or events that could compromise them.
Security for most organizations sits at the intersection of physical and digital. Physical security covers the office, equipment, and access to sensitive spaces. Digital security covers accounts, data, systems, and the people who can access them. Both are worth mapping, and the biggest risks are usually at the boundary between the two.
A practical starting point is access: who can get into the building, who has administrator accounts on core systems, who knows the passwords to shared accounts, and what happens to all of that when someone leaves. Access that is not actively managed is access that is not actually controlled.
Incident response is the piece most organizations do not have. When a breach or security incident occurs, the first hour is the most important and the most chaotic. Even a simple written checklist of who to contact and what to do first is more useful than nothing.