الفهرس 
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Abstract
The present study has attempted to analyze text-based CMC in Egypt in the light of de Beaugrande and Dressler’s (1981) theory of textuality and within a socio-pragmatic framework. The study has found that Internet users adjust patterns of cohesion in their texts according to the demands of the medium of communication. As to coherence in CMC texts, the majority of emails in the corpus are topically coherent and most of them also rely on subject lines, quoting, and background knowledge to boost the level of coherence therein. On the other hand, synchronous chat has been generally found to be less coherent than asynchronous chat, insofar as the former has a higher degree of abrupt topic shifts and disrupted turn adjacency. Informativity also plays a very important role in determining the structure of texts in CMC, where users dispense with pieces of language which have a low degree of informativity. Further, the results of the study have suggested that situationality has a great influence on language use in text-based CMC. The study has also concluded that linguistic innovations in CMC contribute to the evolution of text in CMC, as they have emerged to adapt language to the demands of the medium of communication and the expectations of people communicating via this medium on the other.