The TREE command found in later DOS releases displayed directories in a markedly similar fashion.
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Johnson describes the creation of a visual directory tree as follows: 'Everyone in the room when I first drew it on a whiteboard When I sat down, Tom and Dale both said "it can't be done." Henry, on the other hand, could read me like a book, and seeing the look in my eyes said something like, ". possible, but not on today's computers." That was a Friday afternoon, it was running by Monday morning and by the end of the day verified as being accurate by an office full of skeptics. Johnson was the originator of the visual directory tree concept first used in an Epson backup product created by ESI. The XTree name was the concept of Johnson's wife, Arletta, who had made the suggestion: "'XTree'. Additional contributions were made by ESI owners Dale Sinor, Tom Smith, and Henry Hernandez, as well as Ken Broomfield, who provided quality assurance. Johnson, who was working for a company named Executive Systems, Inc.
Work had begun on XTree in December 1984. XTree 1.0 was officially introduced on April 1, 1985, at the West Coast Computer Faire and sold for $39.95. The program also has the benefit of requiring very little memory, essential at a time when less than 640 kB of memory was available for programs to run.
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Even then, the speed and features of XTreeGold were superior - specifically support for the Zip compression format and ability to undelete files. The program filled a required niche in the market, as DOS shipped with only a command-line file manager, until the generally unsuccessful DOS Shell that was provided with MS-DOS 4.0. The program uses a character-mode interface, which has many elements typically associated with a graphical user interface. (ESI) and first released on 1 April 1985, and became highly popular. It was published by Underwear Systems, later Executive Systems, Inc. XTree is a file manager program originally designed for use under DOS.
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