In virtual storage systems, the ratio of the size of real storage to the size of virtual storage. 在虛擬存儲系統中，實際存儲器的大小與虛擬存儲器的大小之比。
The transfer of pages between real storage and auxiliary storage. 實存與輔存之間的頁面傳送(過程)。同pageturning。
In a virtual storage system, a fixed-length block that has a virtual address and that is transferred as a unit between real storage and auxiliary storage. 在虛擬存儲(器)系統中，具有一個虛擬地址並且可以在實存儲器和輔助存儲器之間作為一個單位來傳送的一種長度固定的(數據)塊。
