The objective of this technique is to provide expansions or definitions for
abbreviations by using the abbr element. It is always appropriate to use the abbr element for any abbreviation, including acronyms and initialisms.
This technique has been altered from a sufficient technique to an advisory technique because it uses the title attribute of abbr to provide the expansion of the abbreviation needed to achieve a sufficient technique when used in combination with G102. As noted in the specification:
Relying on the title attribute is currently discouraged as many user agents do not expose the attribute in an accessible manner as required by this specification (e.g., requiring a pointing device such as a mouse to cause a tooltip to appear, which excludes keyboard-only users and touch-only users, such as anyone with a modern phone or tablet).