Simplify the following text for a Grade 14 native English-speaking person.
Original: The Office of United States Director of Central Intelligence ( DCI ) was the head of the United States Central Intelligence Agency , the principal intelligence advisor to the President and the National Security Council , and the coordinator of intelligence activities among and between the various United States intelligence agencies ( collectively known as the Intelligence Community since 1981 ) .
Simplified: The DCI was coordinating intelligence activities among and between the various United States intelligence agencies , also called the American Intelligence Community .