Linux Focus: QCAD: Technical drawing with Linux

“A ‘plan’ is any precise plane representation of a real
object for study or for production purposes. The dimensions of each
element (entity) of which the drawing consists of, must be exact no
matter what scaling is used. This differentiates a CAD program from
a vectorial drawing tool such as Sketch, Illustrator or Corel Draw,
which is a more or less faithful representation of reality. With
CAD a plan first of all has to be exact. This is in contrast to
illustrations (Drawing) where the aesthetics of a picture are of
more concern.”

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