Myat Noe Wai, Thwe Thwe Htoo and Lu Maw 2020. 4-DOF Robot Arm for Pick and Place Process: Review Article. International Journal of Advances in Scientific Research and Engineering (IJASRE), ISSN:2454-8006, DOI: 10.31695/IJASRE. 6, 11 (Nov. 2020), 55–64. DOI:https://doi.org/10.31695/IJASRE.2020.33927.