[Commentor] LC-339 Ian Jacobs [Working Group decision] We have removed the word "tab" and used a more generic wording about navigation order. [Commentor reply] yes [Comment] 
* Perhaps "tab order" is the term of art. Do people use a tab key on mobile devices? In UAAG 1.0 we talk about "sequential navigation" (distinguished from "direct navigation" through keyboard shortcuts).