This paper reports on ongoing work on disfluencies carried out at Telia Research AB. Four travel dialogue corpora are described: human–"machine"–human (Wizard-of-Oz); human–“machine” (Wizard-of-Oz); human–human and human–machine. The data collection methods are outlined and their possible influence on the collected material is discussed. An annotation scheme for disfluency labelling is described. Preliminary results on five different kinds of disfluencies are presented: filled and unfilled pauses, prolonged segments, truncations and explicit editing terms.