Here is a UML class diagram about the security guard system. UML, which stands for Unified Modeling Language, is one of the most popular ways of providing an in-depth visual representation for software development and engineering. Ideally, UML diagrams are associated with object-oriented programming languages like C++ or Java. It helps us provide an overall structure of the software and the flow of instructions. Learn more details from this class diagram, and try to make yours with ease now!