Abstract: An elongated weapon cleaning device defines apertures sized and shaped to receive and frictionally secure the stick portion of a cotton swab segment. Integrated hinges facilitate insertion of the stick and exertion of frictional holding forces on the stick. The cotton swab segment protrudes at an angle that permits access to all surfaces of a locking lug within the chamber of the weapon, and in particular the back surface of the locking lug which is particularly difficult to reach. A cotton swab segment can be inserted upwardly or downwardly into the aperture, thereby causing the cotton swab segment to protrude at an angle, or the corresponding supplementary angle, for each aperture.

Abstract: A sparse matrix paging system is provided that dynamically allocates memory resources on demand. In some cases, this is accomplished by dynamically allocating memory resources, preferably only after a page has been requested. Such a sparse matrix paging system may allow a platform with a large linear address space to more efficiently execute on a platform with a smaller linear address space. Preferably, the sparse matrix paging system only indexes those pages that are actually requested and used in the address space on main store pages or backing store pages. Further, the backing store is preferably not involved unless the total address space allocated by the operating system exceeds the available main store pages.