1. When referring to sound, volume or vol refers to the amplitude of the sound being projected from a speaker. As seen in this picture, two knobs are used to change the volume level; one that controls the Subwoofer and one fore the Main (overall) Volume.
2. When referring to computer information, volume or vol refers to any medium capable of storing data.
3. Vol is a command MS-DOS and Windows utilize to display a drive's volume information. See our vol command page for further information.