Ellis, Michael E., Miguel I. Aguirre-Urreta, Kiljae (Kay) Lee, Wenying Nan Sun Sun, Yucong Liu, Juan Mao, and George M. Marakas. 2016. “Categorization of Technologies: Insights from the Technology Acceptance Literature”. Journal of Applied Business and Economics 18 (4). https://articlegateway.com/index.php/JABE/article/view/856.