Steve Jobs A Book by Walter Isaacson en.wikipedia.org You'll know it's thereThe Apple Marketing PhilosophyNot just in the detailsAn icon is a symbol equally incomprehensible in all human languagesIf it could save a person's life, would you find a way to make it faster?+31 More Traditional companies are losing because they mismanage software engineersEulogy for Steve Jobs“Design” is now “Product”
The problem with trees Many systems are organized hierarchically. The CERNDOC documentation system is an example, as is the Unix file system, and the VMS/HELP system. A tree has the practical advantage of giving every node a unique name. However, it does not allow the system to model the real world. For example, in a hierarchical HELP system such as VMS/HELP, one often gets to a lead on a tree such as: HELP COMPILER SOURCE_FORMAT PRAGMAS DEFAULTS only to find a reference to another leaf: Please see HELP COMPILER COMMAND OPTIONS DEFAULTS PRAGMAS and it is necessary to leave the system and re-enter it. What was needed was a link from one node to another, because in this case the information was not naturally organized into a tree. Tim Berners-Lee, Seeing With Fresh Eyes A City Is Not a Tree hierarchywww