 While 86-DOS supported three disk formats (250.25 KiB, 616 KiB and 1232 KiB with FAT IDs 0xFF and 0xFE on 8-inch (200 mm) floppy drives, IBM PC DOS 1.0, released with the original IBM Personal Computer in 1981, supported only an 8-sector floppy format with a formatted capacity of 160 KiB (FAT ID 0xFE) for single-sided 5.25-inch floppy drives, and PC DOS 1.1 added support for a double-sided format with 320 KiB (FAT ID 0xFF).PC DOS 2.0 introduced support for 9-sector floppy formats with 180 KiB (FAT ID 0xFC) and 360 KiB (FAT ID 0xFD).86-DOS 1.00 and PC DOS 1.0 directory entries included only one date, the last modified date.