Science Advisor to the President War II by President Franklin Delano Roosevelt. Vannevar Bush chaired this office through Roosevelt's death in 1945, and continued under Roosevelt's successor Harry S. Truman until 1951. After the war, President Harry S. Truman replaced the OSRD with the Science Advisory Committee in 1951. The office was moved to the White House on November 21, 1957, by President Dwight D. Eisenhower to provide advice and recommendation in response to the Space Race started by the USSR's launch of the first artificial Earth satellite, Sputnik 1. President Richard M. Nixon eliminated the PSAC in 1973, rather than appointing a replacement for
First Toronto Post Office before York became the City of Toronto. Therefore, the post office is known both as the "Fourth York Post Office" (as there had been three prior post offices in the settlement) and "Toronto's First Post Office" (as it was the first post office to serve the newly incorporated city). The building served as a post office until 1839. James Howard Scott served as the first Postmaster for the new Town of Toronto. Some sources, such as John Ross Robertson, say that this building, although built in 1832, was not used as a post office until 1836. The first city directories