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Quidis a French encyclopedia, established in 1963 by Dominique Frémy. It was published annually between 1963 and 2007, first by Plon (1963-1974) and later by Éditions Robert Laffont (1975-2007), and was the most popular encyclopedic reference work in France.
The presentation is very compressed, and abbreviations are used extensively in telegraph style. It uses very thin paper to get all the information into one volume. It is published each year in one volume about the size of a large dictionary. The motto of the encyclopedia is "Tout sur tout... tout de suite" (translated as: "Everything on...