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.
Where uses are in actual fact homogeneous, we often find that deliberate distinctions and differences are contrived among the buildings. But these contrived differences give rise to esthetic difficulties too. Because inherent differences—those that come from genuinely differing uses—are lacking among the buildings and their settings, the contrivances represent the desire merely to appear different.
Some of the more blatant manifestations of this phenomenon were well described, back in 1952, by Douglas Haskell, editor of Architectural Forum, under the term “googie architecture.” Googie architecture could then be seen in its finest flowering among the essentially homogeneous and standardized enterprises of roadside commercial strips: hot-dog stands in the shape of hot dogs, ice-cream stands in the shape of ice-cream cones. These are obvious examples of virtual sameness trying, by dint of exhibitionism, to appear unique and different from their similar commercial neighbors. Mr. Haskell pointed out that the same impulses to look special (in spite of not being special) were at work also in more sophisticated construction: weird roofs, weird stairs, weird colors, weird signs, weird anything.