What do the letters SOP stand for?

The correct interpretation of the acronym SOP is "Standard Operating Procedures." This term refers to established guidelines or protocols that outline the specific steps and criteria that should be followed in performing operational tasks. SOPs ensure consistency and quality in the execution of duties, especially in military contexts, where adherence to procedures can impact safety and efficiency during operations. They serve as a critical resource for training and provide a framework for personnel to understand their roles and responsibilities clearly. The other options, while they may sound plausible, either misrepresent the common terminology used in military and operational settings or introduce terms that are not widely recognized in this context.