Mechanical drawings in a set of blueprints are designated with which letter?

In a set of blueprints, mechanical drawings are designated with the letter "M." This labeling is part of standardized conventions in engineering and architectural drawings, where different types of blueprints are categorized by specific letters to simplify reference and organization. The "M" designation specifically indicates that the drawings contain information related to mechanical systems, machinery, and components, which is crucial for those involved in the construction and installation process. Understanding this terminology helps professionals effectively communicate and interpret complex sets of blueprints, ensuring accurate completion of projects.