This guide presents a hard disk fitness program - one that will help DOS users optimize the speed, performance and capacity of their storage media. Gookin's workout includes a mix of daily file management, batch file techniques and computer security exercises designed not only to solve hard disk problems but also prevent them. Readers learn how to: customize AUTOEXEC.BAT and CONFIG.SYS; organize directories, sub-directories and paths; write disk management batch files using MS-DOS Editor; create do-it-yourself batch file menu systems; build up menu screens using ANS.SYS; use DOS shells to aid in everyday disk management; and protect data from accidental loss, hardware failure and unauthorized access. Designed to serve also as a desktop reference, "Hard Disk Aerobics" includes DOS command summaries, EDLIN and ANSI.SYS commands, an extended ASCII conversion chart, and a 3.5" disk containing all the book's batch files and a free menu building program written by Gookin.