This academic blog will be dedicated toThe relational database MUSE (acronym for: “Manuscrits, usages des supports d’écriture” - "Manuscripts, Uses of Writing Materials"). MUSE is an original application, illustrated with digitized images (watermarks, dry stamps, manuscripts), which allows a systematic and detailed material description to be made of any manuscript corpus of the eighteenth to the twenty-first century. Designed primarily for the identification of paper types, this application has become a real research auxiliary to support researchers in describing any kind of written object on paper. It facilitates the development and validation of working hypotheses on literary drafts and paper archives (classification, dating ...), but also more widely the study of the uses and practices of writing in the modern and contemporary era.