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Y.J. Doran Doran is Senior Lecturer in the National School of Education at the Australian Catholic University.

J R Martin is Professor of Linguistics at the University of Sydney. His research interests include systemic theory, functional grammar, discourse semantics, register, genre, multimodality and critical discourse analysis, focussing on English and Tagalog - with special reference to the transdisciplinary fields of educational linguistics and social semiotics.

Michele Zappavigna is Associate Professor at the University of New South Wales, Sydney. As a linguist, her primary focus is on exploring the language of microblogging and social media. Her research in this area investigates discursive patterns in social media texts and corpora.