This article discusses the form of employmment differing from the standard model of a stable regular job which have proliferated since the 1980s. It begins by examining the erosion of the norms governing full-time employment. This is followed by a presentation of the «new» job forms (part-time, temporary, self-employment) proliferating along side salaried workers, this as an illustration of the differentiation phenomenon. This non-exhaustive typology is meant to inform an inquiry into the erosion of the regular salaried job as a basic category vis-a-vis the multiplication of differentiated job forms. The author argues that this phenomenon is related to a transformation of the tertiary sector.