alphanumeric journal The Journal of Operations Research, Statistics, Econometrics and Management Information Systems https://www.alphanumericjournal.com/ Alphanumeric Journal seeks submissions for a special issue on 40 years of Grey Systems Theory and Applications. For more details, please refer to the link below https://alphanumericjournal.com/cfp/ Alphanumeric Journal has been publishing as "International Peer-Reviewed Journal" every six months since 2013. Alphanumeric serves as a vehicle for researchers and practitioners in the field of quantitative methods, and is enabling a process of sharing in all fields related to the operations research, statistics, econometrics and management informations systems in order to enhance the quality on a globe scale.