Plans are a set of drawings or two-dimensional diagrams used to describe a place or object, or to communicate building or fabrication instructions. Usually plans are drawn or printed on paper, but they can take the form of a digital file.

These plans are used in a range of fields from architecture, urban planning, mechanical engineering, civil engineering, industrial engineering to systems engineering.

https://en.wikipedia.org/wiki/Plan_(drawing)

"Better by far to embrace the hard truth than a reassuring fable."
Carl Sagan
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