Floppy disks are slower to access than hard disks and have less storage capacity, but they are much less expensive. And most importantly, they are portable. The common size for PCs made before 1987. The hard drive is a magnetic disk on which you can store computer data. The term hard is used to distinguish it from a soft, or floppy, disk.
Hard disks hold more data and are faster than floppy disks.
A single hard disk usually consists of several platters. Each platter has the same number of tracks, and a track location that cuts across all platters is called a cylinder. In general, hard disks are less portable than floppies, although it is possible to buy removable hard disks. The keyboard is a set of keys that allows you to enter data into the computer. Another keyboard design, which has letters positioned for speed typing, is the Dvorak keyboard.