The facility to obtain data from storage devices or to enter data into a storage device in such a way that the process depends only on the location of that data and not on a reference to data previously accessed.

• 从存储设备得到数据，或把数据输入到存储设备上的一种存取方法。这种方式的存取过程仅仅取决于数据的位置，而不必参考前面存取过的数据。对照serialaccess。