We are happy to announce the contents of ++ Volume 98 of the Information Systems Journal ++ This edition contains a special section on "Big Data for Smart Cities". -- Regular articles -- Thomas Chatain, Mathilde Boltenhagen, Josep Carmona Anti-alignments - Measuring the precision of process models and event logs Information Systems, Volume 98, 2021, 101708, ISSN 0306-4379 https://doi.org/10.1016/j.is.2020.101708 T. M. Tariq Adnan, Md. Mehrab Tanjim, Muhammad Abdullah Adnan Fast, scalable and geo-distributed PCA for big data analytics Information Systems, Volume 98, 2021, 101710, ISSN 0306-4379 https://doi.org/10.1016/j.is.2020.101710 Paul Pop, Bahram Zarrin, Mohammadreza Barzegaran, Stefan Schulte, Sasikumar Punnekkat, Jan Ruh, Wilfried Steiner The FORA Fog Computing Platform for Industrial IoT Information Systems, Volume 98, 2021, 101727, ISSN 0306-4379 https://doi.org/10.1016/j.is.2021.101727 -- Special Section: Big Data for Smart Cities -- Marcos Aurelio Carrero, Martin A. Musicante, Aldri Luiz dos Santos, Carmem S. Hara A DSL for WSN software components coordination Information Systems, Volume 98, 2021, 101461, ISSN 0306-4379 https://doi.org/10.1016/j.is.2019.101461 Saeed Taghizadeh, Abel Elekes, Martin Schaeler, Klemens Boehm How meaningful are similarities in deep trajectory representations? Information Systems, Volume 98, 2021, 101452, ISSN 0306-4379 https://doi.org/10.1016/j.is.2019.101452 Regis Pires Magalhaes, Francesco Lettich, Jose Antonio Macedo, Franco Maria Nardini, Raffaele Perego, Chiara Renso, Roberto Trani Speed prediction in large and dynamic traffic sensor networks Information Systems, Volume 98, 2021, 101444, ISSN 0306-4379 https://doi.org/10.1016/j.is.2019.101444 Victor A. Alencar, Felipe Rooke, Michele Cocca, Luca Vassio, Jussara Almeida, Alex Borges Vieira Characterizing client usage patterns and service demand for car-sharing systems Information Systems, Volume 98, 2021, 101448, ISSN 0306-4379 https://doi.org/10.1016/j.is.2019.101448 Editors-in-Chief Dennis Shasha, Gottfried Vossen, Matthias Weidlich