This document lists and describes various data collection methods and tools that can be used across different fields such as human resources, sales and marketing, engineering, IT systems, and scientific research. It includes both qualitative and quantitative methods such as interviews, questionnaires, surveys, observations, reports, and external sources from magazines, journals, and conferences. The methods vary in their characteristics, including whether they provide objective factual data or subjective inferential data, and whether they are formal or informal in nature.