As a service to our referees, readers, and authors, starting January 1, 2015, the Physical Review journals and Physical Review Letters will allow article titles in the reference list. As always, the word count does not include the title, byline, abstract, or references, and the addition of titles to the reference list, therefore, does not affect any word count. The Editors are confident that adding titles to the reference list will improve the readability and quality of papers and encourage authors to include them in all articles.