no they did not exist
John Adams used it.
Abigail Adams, the First Lady to President John Adams is the one who hung laundry in the East Room to dry. The East Room was not being used at the time.
In the emergency room.
Emergency room Emergency Room
Electric Needle Room's song about him...try the related link.
Adams went to one-room schools run and taught by individual teachers and was admitted to Harvard where he earned a degree.
The Emergency Room was created in 2007.
It can be called an emergency room doctor or it can be called and Emergency physician.
He doesn't have one. The presidential library system began in 1939 well past the time of Adams. The Library of Congress does have a room named after him.
The purpose of an emergency room is to get emergency treatment for people who are sick or injured. When people have car wrecks or other accidents, the emergency room saves their lives.
ER stands for Emergency Room
If you're referring to "The" emergency room rather than "An" emergency room, you can consider it a proper noun and capitalize it. In general it is not capitalized.