| Subject | English | Korean |
| comp., MS | actor class | 행위자 클래스 (The basic component of a ROOM structure diagram. The space inside the actor can contain actor references, behavior end ports, reference ports, bindings, and layer connections. The border can contain class relay ports and class end ports) |
| comp., MS | actor reference | 행위자 참조 (The actors that define components of your structure diagram. Actor references can appear only inside an actor class. An actor reference can have reference ports on its outside border) |