Read - only memory . a broad classification of memory devices that includes all devices in which the individual memory locations may be read , but not written 只读存储器。一个包括所的的每个地址只能被读,不能被写的存储器的大概分类。
Random - access memory . a broad classification of memory devices that includes all devices in which individual memory locations may be read or written as required 随机访问存储器。一个包含了所有每个地址能被按需读写的存储设备的粗略分类。