FILE CREATING METHOD FOR CONSTRUCTING SYSTEM ENVIRONMENT, SYSTEM ENVIRONMENT CONSTRUCTING METHOD AND COMMAND START SYSTEM

A file creation method for constructing a system environment, a system environment constructing method, and a command start system. Prior to using the system, a plurality of application programs are classified into field groups, which are further divided into groups on the basis of functions thereof. The groups are further divided into input items on the basis of command options. Every layer of a hierarchy is ranked. Character strings are assigned to icons, button and data input frame so as to represent names or functions of groups. Files are created for every layer and group so that they contain information on the ranks, icons, and linkages between files. The files are read out and displayed in a top-down manner according to their ranks, so that a specific application program can be designated by selecting at least one icon or option, or entering an input item. Thereafter, the application program will be started.