Filing was the practice of arranging documents in specific orders or classifications. This could be done using a filing cabinet or within a computer database. Aamin Marritza taught filing at the Cardassian Military Academy on Kora II from 2364 to 2369. (DS9: "Duet") In 2377, Seven of Nine began reorganizing The Doctor's files, saying his former filing system was inefficient. (VOY: "Imperfection")