- Makoto P. Kato, Yiqun Liu 0001, Noriko Kando, Charles L. A. Clarke. Report on the 15th round of NII testbeds and community for information access research (NTCIR-15). SIGIR Forum, 55(2), 2021.
- Nikos Voskarides. Supporting search engines with knowledge and context. SIGIR Forum, 55(2), 2021.
- Dirk Ahlers, Erik Wilde, Marc Spaniol, Ricardo Baeza-Yates, Omar Alonso. Report on the 11th international workshop on location and the web (LocWeb 2021) and the 11th temporal web analytics workshop (TempWeb2021) at WWW2021. SIGIR Forum, 55(2), 2021.
- Monica Landoni, Emiliana Murgia, Theo Huibers, Maria Soledad Pera. Report on the 1st IR for children 2000-2020: where are we now? (IR4C) workshop at SIGIR 2021: the need to spotlight research on children information retrieval. SIGIR Forum, 55(2), 2021.
- Ben Carterette. Chair's letter. SIGIR Forum, 55(2), 2021.
- Chang Li. Optimizing ranking systems online as bandits. SIGIR Forum, 55(2), 2021.
- Martin Potthast, Benno Stein 0001, Matthias Hagen. The information retrieval anthology 2021: inaugural status report and challenges ahead. SIGIR Forum, 55(1), 2021.
- Omar Alonso, Stefano Marchesin 0001, Marc Najork, Gianmaria Silvello. Report on the 2nd international conference on design of experimental search & information retrieval systems (DESIRES 2021). SIGIR Forum, 55(2), 2021.
- K. Selçuk Candan, Guglielmo Faggioli, Nicola Ferro 0001, Lorraine Goeuriot, Bogdan Ionescu, Alexis Joly, Birger Larsen, Maria Maistro, Henning Müller, Florina Piroi. Report on the 12th conference and labs of the evaluation forum (CLEF 2021): experimental IR meets multilinguality, multimodality, and interaction. SIGIR Forum, 55(2), 2021.
- Tirthankar Ghosal, Khalid Al Khatib, Yufang Hou 0001, Anita de Waard, Dayne Freitag. Report on the 1st workshop on argumentation knowledge graphs (ArgKG 2021) at AKBC 2021. SIGIR Forum, 55(2), 2021.