e/Miller Columns

Information
has gloss	eng: Miller Columns are a /visualization technique that can be applied to tree structures. The columns allow multiple levels of the hierarchy to be open at once, and provide a visual representation of the current location. It is closely related to techniques used earlier in the Smalltalk browser, but was independently invented by Mark S. Miller in 1980 at Yale University. The technique was then used at Project Xanadu, Datapoint, and NeXT.
lexicalization	eng: Miller Columns
instance of	e/Filemanager