This document discusses the different types of research methodology. It identifies 5 main categories for classifying research: 1) general category, which includes quantitative and qualitative research, 2) nature of study, such as descriptive and analytical research, 3) purpose of study, including applied and fundamental research, 4) data type, which is primary or secondary research, and 5) research design like exploratory and conclusive research. For each category, it provides examples and brief explanations of the different types of research that fall under that classification.