HTML <abbr> element
<abbr> tag declares an abbreviation or acronym. It has an attribute title,
which can be used to describe the abbreviation.
<abbr>AIDS</abbr> can be sexually transmitted.AIDS can be sexually transmitted.
Add a description using "title" attribute. When cursor hovers over the abbreviation, the description will pop up.
<abbr title="Acquired Immune Deficiency Syndrome">AIDS</abbr> can be sexually transmitted.AIDS can be sexually transmitted.
<acronym>tag is similiar to
<abbr>tag. It refers to an abbreviation formed with the 1st letter of several words.
<acronym>tag is deprecated in HTML5.