Description:

The <abbr> tag describes an abbreviated phrase or acronym.

By marking up abbreviations you can give useful information to browsers, spellcheckers, screen readers, translation systems and search-engines.

Example Code:
The town was another 50 <abbr title="kilometers">km</abbr> away
Result:
The town was another 50 km away.
Attributes:

None

Global Attributes:

The <abbr> tag also supports the Global Attributes in HTML5

Event Attributes:

The <abbr> tag also supports the Event Attributes in HTML5