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Operating system: memory allocation and recovery experiments complete source code for programming dynamic storage management of memory allocation and recovery. Topics include: 1, the partition table to determine the memory free and process memory allocation table 2, with the completion of the first-fit algorithm to allocate memory space of 3, with best-fit allocation algorithm completes the memory space of 4, to achieve memory recovery features, including separate collection and on top of the free area adjacent to the combined recovery adjacent to an empty area below the combined recovery and on the bottom the free area adjacent to merge recovered.