- function control block (fcb)英语什么意思：In Subsystem Support Services, a control block that contains information such as a function's status, event control block, task I/O queue, and I/O queue.; 在子系统支持服务程序中,一种包括功能状态、事件控制块、任务输入输出队列及输入 输出队列等信息的控制块。
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