Hardware or software used to monitor and control physical devices and processes.

List
Concepts
- Modbus
- Distributed Network Protocol 3
- IEC 61850
- SPAN
- Network Tap
- IT-OT Connectivity
- OT CVE Decision Tree
- Open Platform Communications
- Open Platform Communications Unified Architecture
- Network Determinism
- Virtual Patching
Tools
Historical Attacks
- Stuxnet
- Triton
- German Steel Mill Attack
- Ukraine Power Grid 2015 Attack
- nmap OT System Shutdown
- Poland Power Grid Attack