This issue contains 5 articles with 12 authors from 5 Institutions (Telkom University, University of Trunojoyo, Statistics Indonesia, Jakarta Smart City, STIS Polytechnic of Statistic)

This issue contains 5 articles with 13 authors from 5 Institutions (Telkom University, Ritsumeikan University, Islamic University of Riau, STIS Polytechnic of Statistic, The Indonesian Institute of Science (LIPI))

This issue contains 5 articles with 16 authors from 6 Institutions (Telkom University, Institute of Teknologi Sepuluh Nopember (ITS), Christian University of Satya Wacana, STIS Polytechnic of Statistic, Bogor Agriculture University (IPB), Institute of Technology Telkom Purwokerto)

This issue contains 5 articles with 10 authors from 6 Institutions (Telkom University, Statistics Indonesia, STIS Polytechnic of Statistic, The Indonesian Institute of Science (LIPI), University of Langlangbuana, Institute of Technology Telkom Purwokerto)