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Short for floppy drive, high density, and pronounced fud-hud. FDHD refers to 3½-inch disk drives for Macintosh computers that can accept double-density or high-density 3½-inch floppy disks. FDHDs can also read DOS -formatted floppy disks, which enables Macintosh computers and PCs to share data. FDHD drives are often called SuperDrives.

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