Sub

Sub may refer to any of the following:

1. In programming, a sub is short for the word subroutine.

2. With speakers, a sub is short for the word subwoofer.

3. With text and typography, sub is short for the word subscript.

4. In e-mail and messages, sub is short for the word subject.

5. With HTML (hypertext markup language), the <sub> tag designates subscript text.

6. In online communication, sub is short for subscribe or subscription.

7. A sub may also be short for "substitute," see our subst command page for information about the MS-DOS and Windows command line commands.