OT Lexicon

OT Lexicon explains industrial networks and operational technology in a clear, practical way. Learn IP addresses, gateways, VLANs, Profinet, OPC UA, Modbus, ports, subnet masks, DNS, NTP, fiber optics and many more OT fundamentals. Built for electricians, technicians and OT beginners, the app turns complex network terms into simple explanations, everyday comparisons, diagrams, practical plant examples and quiz questions. Premium unlocks knowledge checks, custom company terms, plant examples, favorite notes and a practical port and protocol overview. Ideal for quick reference in the workshop, during commissioning or while troubleshooting industrial systems.