t+Tab` keys to move focus from one UI component to another.
Other keys (primarily the arrow keys) move focus within components comprised of multiple focusable elements.
Authors must follow this convention and provide no more than one tab stop per component (providing keyboard focus) and insure the keyboard tab sequence is logical.
In addition, the keyboard operations should be consistent with common keyboard interface conventions described in the [ARIA Patterns](https://www.w3.org/WAI/ARIA/apg/patterns/), e