Douglas Biber is Regents' Professor of English (Applied Linguistics) at Northern Arizona University. His research efforts have focused on corpus linguistics, English grammar, and register variation. Previous books include Register, Genre, and Style (2009/2019); the co-authored Longman Grammar of Spoken and Written English (1999); and studies of grammatical complexity (2016), university registers (2006), and Multi-Dimensional Analyses of register variation (1988, 1995, 2018). Bethany Gray is Associate Professor of English (Applied Linguistics and Technology) at Iowa State University. Her research employs corpus linguistics methodologies to explore register variation, with a focus on academic language. Her publications include monographs on academic research articles (2015) and historical change in writing (2016). She is a co-founding editor of Register Studies. Shelley Staples is Associate Professor of English (Applied Linguistics/SLAT) at the University of Arizona. Her research focuses on corpus analysis, particularly for applications to language learning/teaching. Her publications include a monograph and edited volume on healthcare discourse, as well as articles in the Journal of English for Academic Purposes, English for Specific Purposes, Applied Linguistics, and TESOL Quarterly. Jesse Egbert is Associate Professor of Applied Linguistics at Northern Arizona University. He specializes in register variation, corpus linguistics, and quantitative research methods. He is a General Editor of Register Studies. Two of his recent books focus on online register variation (2018) and corpus linguistics methods (2020).