orthographic projection aka orthogonal drawing

What are some sources for and examples of orthographic projection-also referred to as orthogonal or orthographic drawing? How is it defined?

Check out these books at RISD:
Orthographic projection simplified
Rapid Viz
The principles of architectural drafting : a sourcebook of techniques and graphic standards (pages 38-39)

Also, consider these books at Brown

For a definition of orthographic projection, see
Orthographic Projection (Source: Getty Art & Architecture Thesaurus)