::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.
This article gives you some background on how the ACT test is scored and what makes up a perfect score. ACT was once an acronym that stood for the American College Testing program. In 1996 their name was officially changed to ACT. The ACT exam is one of two primary college admission exams.