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.
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The BBC's chief content officer Kate Phillips told staff the BBC took "full responsibility" for what happened, adding that another racial slur had been edited out of the broadcast.
"It's a very interesting piece of evidence of textile advancements in the Anglo-Saxon period," said Willow Major, a post-excavation assistant.