为了加强数据的保护，防止非法的存取，用于评价计算机系统、存储空间和运行过程完整程度的一种指标。
A term applied to a computer system, spaces, or operating procedures when considering the protection of data from corruption or unauthorized access.
一种能动态重新安排存储器的处理技术，即把各连续已用的存储段移到存储器的一端，把未使用的存储空间集中到存储器的另一端。
A process of dynamic relocation in which contiguous segments are moved to one end of the memory to combine all unused storage at the other end.
把数据元放入各个字中的相邻二进制位上，从而能最大限度地利用存储空间的处理方法或过程。
The process of making the most effective use of storage by placing data elements into contiguous bit positions of words.
