Good News about publication:IC4E 2020 | ISBN: 978-1-4503-7294-7 | ACM Digital Library | Index: EI Compendex, ScopusIC4E 2019 | ISBN: 978-1-4503-6602-1 | ACM Digital Library | Index: EI Compendex, ScopusIC4E 2018 | ISBN: 978-1-4503-5485-1 | ACM Digital Library | Index: EI Compendex, ScopusIC4E 2017| ISBN: 978-1-4503-6602-1 | ACM Digital Library | Index: EI Compendex, Scopus == Publication:Accepted excellent papers by IC4E 2021 will be published by ACM, which will be archived in the ACM Digital Library, and sent to be indexed by EI Compendex and Scopus and submitted to be reviewed by Thomson Reuters Conference Proceedings Citation Index (ISI Web of Science) ISBN: 978-1-4503-8854-2