For centuries, scent has been captured, recorded and dispersed. A design problem remains: how can scent become shared data capable of digital manipulation? This chapter considers headspace technology as used by Sissel Tolaas, Roman Kaiser and Amy Radcliffe. David Edwards’ oPhone and other attempts to democratize the capture, coding and dispersal of smell establish this as a moment for re-assessing scent as a category of experience, knowing and cultural discipline.