The Executive Office of the President was established in 1939. It comprises various executive agencies directly under the president, such as Council of Economic Advisors, Office of the U.S. Trade Representative, and the Council on Environmental Quality.
We have a partial collection of documents from the agencies under the Executive Office of the President. Examples include:
President's Committee on Employment of the Handicapped (PrEx 1.10/)
National Security Council (PrEx 3.10/)
Office of Emergency Preparedness (PrEx 4)
Foreign Broadcast Information Service (PrEx 7)
Office of Science and Technology (PrEx 8)
Office of the U.S. Trade Representative (PrEx 9)
Office of Economic Opportunity (PrEx 10)
National Council on Marine Resources and Engineering Development (PrEx 12)
Council on Environmental Quality (PrEx 14)
Offce of Policy Development (PrEx 15)
Office of Science and Technology Policy (PrEx 23)
Office of Drug Abuse Policy (PrEx 24) and Office of National Drug Control Policy (PrEx 26)