MC

= Machine Cycle,机器周期;

= Magnetic Card, 磁卡片;

= Magnetic Core, 磁芯;

= Maintenance Center, 维修中心;

= Master Card, 主卡片;

= Master Clock, 主时钟；主脉冲;

= Master Control, 主控制;

= MegaCycle, 兆周;

= Memory Control(ler), 存储器控制(器)