::placeholder. The ::placeholder pseudo element (or a pseudo class, in some cases, depending on the browser implementation) allows you to style the placeholder text of a form element. As in, the text set with the placeholder attribute: <input type=email placeholder=jane@firefly.com>.
Australian Capital Territories. As of 1996 A.C.T. changed it's name to ACT. It no longer stands for American College Testing since they do so many other things besides just the testing.
The optional Writing Test measures skill in planning and writing a short essay. Specifically, ACT states that its scores provide an indicator of college readiness, and that scores in each of the subtests correspond to skills in entry-level college courses in English, algebra, social science, humanities, and biology.