In what year did Harry S. Truman first take office as President?

Who succeeded Harry S. Truman as President of the United States? Who was President immediately before Harry S. Truman? Which political party did President Harry S. Truman belong to? Which president served from 1945 to 1953? Who served as Vice President under Harry S. Truman? Under which president did Alben W. Barkley serve as Vice President? Who was First Lady during Harry S. Truman's presidency? Bess Truman was married to which president?