A term applied to an operation (say, parity checking) or to a hardware element (say, microcode storage) that is not evident to a user program and need not be considered by a programmer.

• 用于描述操作(如奇偶校验)或硬件元件(如微码存储器)的术语,对用户程序来说是隐蔽的,且不需要由程序员来考虑。