Mary Bouquet, Family Trees and Their Affinities: The Visual Imperative of the Genealogical Diagram, The Journal of the Royal Anthropological Institute, Vol. 2, No. 1 (Mar., 1996), pp. 43-66 ...

It's also an advanced diagramming software and vector graphics drawing tool, which you can use to build flowcharts, org charts, network diagrams, floor plans, family tree diagrams, general ...