Does anyone know why the computer's hard disk is called C\D\E\F?

In fact, the earliest computer hard disk did partition or assign characters from A. The original operating system was still based on DOS level, and DOS is the abbreviation of disk operating system. The assignment of characters is the process of naming "disk". At that time, computers didn't have large-scale integrated hard disks like now, and they were all floppy disks-magnetic media similar to tapes.

The original floppy disk was 5 inches, but DOS was not widely used at that time. When DOS rose, the 3.5-inch floppy disk had appeared, but the 5-inch floppy disk had not disappeared, belonging to the replacement stage. For high-end compatibility, a 3.5-inch floppy disk is used as the letter A when naming, while B uses a 5-inch floppy disk. Later, the hard disk with IDE as the interface appeared, and naturally C was assigned as a drive letter, and so on, as well as floppy disk technology.

Now when we use it, we occasionally use disk A (especially Win98 and other systems). If there is no floppy drive on your machine, it is virtual, simulating the state of running under DOS. Because the 5-inch disk B was completely replaced by disk A, disk B almost disappeared. Now XP, vista and other NT-centered operating systems have come out, and disk A is dying, because it has been completely replaced.

PS: The theoretical maximum capacity of a 3.5-inch floppy disk is 1.44MB, while a 5-inch floppy disk is not only bigger, but also smaller (because it is too old to remember clearly ...).

Are you satisfied ~ ~