{\acro{PDF/UA}\Dash what it is, how users can benefit from it, and~how to get it right} {Olaf Dr\"ummer} {\acro{PDF/UA} is the latest addition to the group of international \PDF\ standards. Published in 2012, it defines what a tagged \PDF\Dash as defined in \PDF~1.7 (per \ISO~32000-1)\Dash must look like to be considered `universally accessible', and how \acro{PDF/UA} conforming tools should take advantage of its features. ``Accessible'' is often thought of as content accessibility from the point of view of people with some disability, but is not nominally limited to that. Content in a \acro{PDF/UA} conforming file can also be more easily and more meaningfully accessed by software, allowing for intelligent content extraction or flexible repurposing (think formatted text reflow on mobile devices). This talks gives a very compact overview of the rules defined in the \acro{PDF/UA} standard, and how a \acro{PDF/UA} file typically differs from an ordinary \PDF\ file. Several sample usage scenarios will be demonstrated so attendees can get a feeling for how \acro{PDF/UA} matters to users who have to rely on \acro{PDF/UA} conforming documents and on suitable tools. Finally, several challenges will be discussed that document authors tend to run into.}