https://preparationpoint.info/solved-past-papers-mcqs/ppsc-past-papers/ppsc-past-papers-2018/model-paper-91-assistant-in-agriculture-bs-16-2018-in-the-punjab-agriculture-department/in-a-computer-system-____-work-in-a-similar-fashion-as-flies-in-folders-are-physically-maintained-in-real-world-offices/