] Art vs. engineering. Aesthetics vs. usability. Usability
] experts are from Mars, graphic designers are from Venus .
] The debate between design (of the visual sort) and design
] (of the technical sort) remains ongoing. A website,
] however, can't take sides: it needs both to be
] successful.

This is for my own reference but feel free to check it out.

Boxes and Arrows: Visible Narratives: Understanding Visual Organization