在分页式管理方式下采用链表法来表示主存分配情况，实现主存空间的分配和回收。- Paging management by using the list method to represent the distribution of main memory, the main memory space allocation and recovery.

在分页式管理方式下采用位示图来表示主存分配情况，实现主存空间的分配和回收。- Paging management diagram to represent the distribution of main memory, the main memory space allocation and recovery