清单2展示了一个简短的php指令集，可以提取需要的数据。
Listing 2 shows a short, simplified set of instructions in PHP to extract the data required.
研究了系统的程序指令集、逻辑堆栈和I/O存储器数据类型，实验表明系统具有良好的实时性和可靠性。
Program instruction set, logic stack and data type of I/O memory which are tied up with tasks in the soft-PLC system are analyzed and studied.
专用处理器，如DSP等，因主要支持特定应用，其指令集往往只支持有限的数据类型。
Special purpose processors, such as DSPs, can only support limited data types in their instruction sets because they are suitable to specific applications.
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