Saussure's term sémiologie dates from a manuscript of 1894. 'Semiology' is sometimes used to refer to the study of signs by those within the Saussurean tradition (e.g. Barthes, Lévi-Strauss, Kristeva and Baudrillard), whilst 'semiotics' sometimes refers to those working within the Peircean tradition (e.g. Morris, Richards, Ogden and Sebeok). Sometimes 'semiology' refers to work concerned primarily with textual analysis whilst 'semiotics' refers to more philosophically-oriented work.