Observations of discursive productions on Twitter, the micro-blogging network, allow to show that the notion of discourse genre, which is already highly heterogeneous in its descriptions, must also include the materialities of technological parameter. After a synthesis about this miscellaneous notion, that crosses several definition criteria, one deepens the notion of discursive technology, which highly articulate environmental materialities to language productions. This concept is developed in a postdualist epistemological framework and non logocentric conception of linguistic analysis. Scriptural activity on Twitter, constrained by the famous 140 characters, produces new genres (tweet, retweet or RT, Follow Friday, etc.), but also shapes out stabilized discourse genres in a new way. We consider these issues by studying conversational genres (the #ClaVed, for example), mediatic genres (tweet as a form of dispatch), teaching genres (Twitter as a medium of writing activity in class) and literary genres (the Twitterature case).
