This element indicates that content is an Abbreviation (a
shortened or contracted form of a word or phrase, used to
represent the whole.) The TITLE attribute is suggested for providing
the full or expanded form of the abbreviation. While knowing the
expanded form may not be implicitly important in the rendering of the
content, it can assist in speech synthesis, spell-checking, and other
document management scenarios.
Some abbreviations can have unexpected pronunciations. Style sheets
should be used in such cases to aid in the pronunciation of the
abbreviated form.