Physical Security Systems control and monitor building access, video surveillance, and intrusion detection — providing a unified security operations layer for corporate offices, campuses, data centers, and other facilities. Core capabilities include access control (badge, mobile credential, biometric), video management (live view, recording, smart search), visitor screening integration, intrusion and alarm monitoring, lockdown and emergency response workflows, analytics (occupancy counting, tailgating detection, license plate recognition), and cloud-based multi-site management. The category has shifted from on-premises DVR/NVR hardware toward cloud-managed platforms (Verkada, Brivo) that unify access control and video in a single dashboard.