A general indication of the size of a book, based on the number of times the printed sheets are folded in binding to make the leaves (folio, quarto, octavo, duodecimo, sextodecimo, etc.).
Also refers to the particular physical presentation of a bibliographic item (AACR2). For printed publications, format includes size, proportions, quality of paper, typeface, illustration, layout, and style of binding. Synonymous in American usage with get up (books). In a more general sense, the physical medium in which information is recorded, including print and nonprint documents. See also: obsolete format, original format, and reformat.
In data processing, the manner in which data is arranged in a medium of input, output, or storage, including the code and instructions determining the arrangement (see file type). Also, to prepare a floppy disk for the recording of data (most floppies are sold preformatted) and to arrange text on a computer screen in the form in which it will be printed on paper (font, margins, alignment, type size, italic, boldface, etc.).
Also used in reference to the physical characteristics of photographic and motion picture film (size, aspect ratio, etc.). Click here for more information, courtesy of the Digital Versatile Developments.