Answer
H.R. signifies a House bill and S signifies a Senate bill.
Explanation
H.R is House Resolution. A Joint Resolution is a legislative proposal that requires the approval of both Chambers in identical form and the president's signature to become law.
A bill is proposed legislation under consideration by a legislature.A bill does not become law until it is passed by the legislature and, in most cases, approved by the executive. Once a bill has been enacted into law, it is called an act of the legislature, or a statute.
The Bolsheviks were the Communist Russians after the overthrow of Tsar Nicholas II. Their revolution eventually led to d. Civil War in Russia against the non-communist rulers. This resulted in the Bolshevik winning and Vladimir Lenin taking over.
The Federal Deposit Insurance Corporation (FDIC) was created in in 1933 and it was to protect bank depositors and ensure a level of trust in the American banking system, during the Great Depression.
The Exchange Commission (SEC) was created in 1934 and the goal was to to help investors feel comfortable to put money back into the stock market.
Both were important to create confidence in american people, and to create the possibility to get out of the Great Depression.