The Federal Reserve (aka ”The Fed”):
System of 12 banks located all around the country, and overseen by a committee based in DC.
The Fed is the Agent of monetary policy which is the way the Fed controls the money supply- the amount of money that's in the banking system and how freely that money flows
The fed has its principal focus on keeping unemployment low and holding prices steady- preventing inflation and deflation.
In the five years following the 2007 Financial Crisis. The Fed pumped $2.7 trillion of new money into the economy in two - rounds of quantitative easing, called QE1 and QE2.-Man v. Markets by Hirsch.
The treasury is the agent of Fiscal Policy, which is how the government, via the treasury, uses taxes and spending to influence the economy.
The treasury secretary acts as the agent of Congress- his department, which includes the IRS and the US mint, carries out congress's decisions.
Printing Money = Quantitative Easing.
Primary Dealers are banks that have committed to make a market in government bonds. In fact, they buy most of the bonds that the government sells, and then sell those bonds on to the public.