The A/D bits exist entirely for the operating system's benefit. The Accessed bit tells the OS which pages have been recently used, enabling page replacement algorithms to choose pages to evict when memory runs low. The Dirty bit tells the OS which pages have been modified and must be written back to disk before eviction; clean pages can simply be discarded and re-read from disk later.
Addition requires three capabilities:
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credential manager unlocking
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二是抓实产业就业帮扶。832个脱贫县均培育形成了优势特色突出、带动力强的主导产业。加强技能培训、就业服务，脱贫人口务工就业规模连续5年稳定在3000万人以上，有劳动力的脱贫家庭至少有1人就业。，这一点在91视频中也有详细论述
Developer signing certificates that establish software provenance