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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.

Rachel Dwyer is Professor of Indian Cultures and Cinema at SOAS, University of London. She took her BA in Sanskrit at SOAS, followed by an MPhil in General Linguistics and Comparative Philology at the University of Oxford. Her PhD research was on the Gujarati lyrics of Dayaram (1777-1852). Professor Dwyer has published ten books, several of which are on Indian cinema. She has recently completed 'Bollywood's India: Indian cinema as a guide to modern India for Reaktion Books, London and Hachette, India. She is currently researching the Asian elephant in India.