1.1 Basic Elements(1/2) Processor(处理器) Main Memory(内存 Volati|e(易失性) referred to as real memory(实存) or primary memory(主存) ˉⅠ/ O modules(输入/输出模块) secondary memory devices (disk communications equipment terminals System bus(系统总线) communication among processors, memory, and I/o modules1.1 Basic Elements(1/2) •Processor(处理器) •Main Memory(内存) • Volatile （易失性） • referred to as real memory(实存) or primary memory（主存） •I/O modules(输入/输出模块) • secondary memory devices （disk） • communications equipment • terminals • System bus(系统总线) • communication among processors, memory, and I/O modules 5