What are the various system of coding drawings?

Various systems of coding drawings include Architectural, Engineering, and CAD (Computer-Aided Design) standards. Architectural drawings often use symbols and annotations to represent building elements, while engineering drawings follow specific conventions like ISO or ASME standards for precision and clarity. CAD systems employ layers, blocks, and attributes to organize and manage complex designs digitally. Additionally, graphic coding systems like UML (Unified Modeling Language) are used for software and systems engineering to visually represent structures and processes.