Applied Science is the application of knowledge from one or more natural scientific fields to solve practical problems. Applied c science is important for technology development. its use in industrial setting is usually referred to as research and development (R&D). Applied science is all science can be found in all sciences. This publication titled "Encyclopaedia of Research Methodology in Applied Sciences" provides readers with an introduction to research methodology in applied sciences. It also focuses on the research methodology in the engineering physical and optical science. The research methodology in materials science is also covered. Similarly, the research methodology in energy science and electronic science has received considerable coverage. The received considerable coverage. The research methodology in artificial intelligence science, computer science nanoscience and micro science have been discussed in detailed. The research methodology applied in ceramic science has been also highlighted. Glossary of terms, acronyms/ Abbreviations, bibliography and links have provided to make this publication more users friendly.