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SequoiaView is a disk browsing tool based on the principle of treemaps, with one unique feature added, namely Cushion Treemaps, invented by Jack van Wijk. The principle is simple: each time a rectangle is subdivided, ridges are added. The result is a pattern of hierarchical cushions that show the structure in the directories and files. The user can set the height of the ridges as well as using lower ridges for deeper nested levels, offering a choice between displaying global information (high level directories) or detailed info such as individual files. The user can also choose between the original cushions and the squarified cushions.