Rajesh Kumar teaches Linguistics in the Department of Humanities and Social Sciences at the Indian Institute of Technology Madras, and received his PhD in Linguistics from the University of Illinois at Urbana-Champaign, USA. His publications include Syntax of Negation and Licensing of Negative Polarity Items, as well as several journal articles. The broad goal of his research is to uncover regularities underlying both the form (what language is) and sociolinguistic functions (what language does) of natural languages. Om Prakash teaches courses in the areas of Applied Linguistics, English Language Teaching, Communication Theories in Media, and Corporate Communication in Humanities and Social Sciences at Gautam Buddha University, India. He received his MA, MPhil, and PhD degrees in Linguistics from the University of Delhi, India. He has published a number of articles in both national and international journals. His broader areas of research include emerging fields in applied linguistics and the interface of language, media and contemporary society.