![]() ![]() This method of adding new categories to the file can be likened to the use of the familiar accordian file in which a suitable pocket can be stretched to fit new material, but the structure of the containing folds of the file and its major pockets remain unchanged This is in contrast to a file of rigid construction in which the only recourse for addition is to append material or to make a new container. For example, categories test equipment-51, external equipment-52, and tools-53, were added later in the only reasonable location in the 50 series, auxiliary equipment. New entries are permitted within the subcategories and parameters without resorting to modification of the original file structure. ![]() However, it is expandable in the sense that, when necessary. ![]()
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December 2022
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