What Is The Difference Between The (A:), (C:), and (D:) Drives?

The (A:) drive is the floppy drive. Older computers used to have two floppy drives, and the second one was the (B:) drive. The (C:) drive is the hard disk drive. This drive is non-removable. The (D:) drive is usually the CD-ROM drive. Sometimes it is the (E:) drive.