Abstract: A support structure such as but not limited to bags, carrying cases, suitcases, file cabinets and storage boxes, including a pegged matrix base structure for permitting a variable configuration of at least one retaining board received thereon. Each said retaining board would include article holders and is detachable from said container floor for expedient access of articles thereto and from. The rows and columns of pegs receive retaining boards in a guiding relationship for secure but detachable engagement. Articles contained on each board may be separately managed and manipulated apart from those of other boards, and removed from the container floor. Removable article holders may be flexibly coupled to the retaining boards for selective configuration of articles on each board.