In this reading Ching basically summarizes the difference between  building and architecture. Many people think that there the same thing but they have there differences. Building is mostly focused on materials, elements, and components. Where in Architecture its more about scale, proportion and organization. This means its about order or patterns for example if theirs a column on one side there should be one in the other side. Its also about human scale and dimensions. For example the rise and tred on stairs or the height of the door etc. Things like this differentiate building to architecture. There are also multiple system when constructing. There are structural, enclosure, and mechanical systems. Where structural systems focus on support and stress and enclosure system consist of roof walls, windows and doors.Finally Mechanical system is based on water, heating, ventilation, and electrical system which basically is what makes a home a home.