Architectural and engineering drawings must communicate important information about structures, pipes and plumbing, power, lighting, communication lines, heating, ventilation, and air conditioning, and more. They also communicate details like surface finishes, walls, and mechanical systems.
One of the most valuable skills for architects is hand sketching prior to creating their more detailed renderings. By using software, architects reduce the time associated with drawing production, improving efficiency of the project.
Wikipedia: Architectural Drawing | An architect’s drawing is a technical drawing of a building.
dickblick.com | Drafting and engineering supplies from Dick Blick.
Wikipedia: Mechanical Systems Drawing