Operational Technology (OT) is a technology that interfaces with the physical world and includes Industrial Control Systems (ICS), Supervisory Control and Data Acquisition (SCADA), and Distributed Control Systems (DCS).  OT is different from IT in that OT prioritizes safety, reliability, and availability, while IT focuses on information confidentiality, integrity, and availability.  The convergence of OT and IT increases system vulnerabilities, which can be addressed by adopting sound risk management principles.  Document Free Webinar : Mitigating Vulnerability & 0-day Threats Alert Fatigue that helps no one as security teams need to triage 100s of vulnerabilities.

Source: GBHackers