Operating Systems File structure 1 By 1 Record Ant‖Fox‖Pi CatCow‖bog‖doat‖uion‖ow‖Pony‖ Rat Worm Hen‖ Ibis‖Lamb (a) byte sequence (UNIX and Windows (b)record sequence (80-character punched card) (c)tree(commercial data processing large mainframe computers) G Three kinds of files Gao Haichang, Software School, Xidian UniversityOperating Systems Gao Haichang , Software School, Xidian University 7 File Structure (a) byte sequence (UNIX and Windows) (b) record sequence (80-character punched card) (c) tree (commercial data processing large mainframe computers)  Three kinds of files