The modes of address employed by texts within a code are influenced primarily by three inter-related factors: textual context: the conventions of the genre and of a specific syntagmatic structure; social context (e.g. the presence or absence of the producer of the text, the scale and social composition of the audience, institutional and economic factors); and technological constraints (features of the medium employed). A basic typology of modes of communication in terms of synchronicity - whether or not the participants can communicate 'in real time' - without significant delays: synchronous interpersonal communication through both speech and non-verbal cues (e.g. direct face-to-face interaction, videolinks); through speech alone (e.g. telephone) or primarily through text (e.g. internet chat systems); asynchronous interpersonal communication primarily through text (e.g. letters, fax, e-mail); asynchronous mass communication through text, graphics and/or audio-visual media (e.g. articles, books, television etc.). Class assignment (group work, done orally): The typology above seems to ignore the importance of "communication in small groups". Can you describe this mode of communication and its specific features relevant to the subject of the lesson?