用来检查、纠正二进制信息序列在传输过程中出现的突发错误的一种循环校验码，它是计算机磁盘存储器常用的错误校验码之一。 A cyclic check code used to check and correct the burst error appeared in the transmission procedure of binary information sequence. It is one of the error check codes in common use for computer disc memory.
一种只读存储器，其中的内容可以擦除，使存储器成为空白状态。 A type of read-only memory that can be erased, thereby returning the device to a blank state.
最重要的程序都在只读存储器中。 The most important programs are in the read only memory.