So apparently most of the U.S. government departments have been using
Department of ..., like Department of Defense, Department of Homeland Security. But it looks like there's a weird exception, Department of Education (ED).
As we see it also use the pattern of
Department of ... but its abbreviation is meaning Education Department. Why is it different from others? Why isn't ED abbreviated as DOE?
Quote from Wikipedia: United States Department of Education:
The United States Department of Education (ED or DoED), also referred to as the ED for (the) Education Department, is a Cabinet-level department of the United States government.