Resolution outlining the work of the newly established Design Bureau No.11 (KB-11). Atomic bombs are referred to in the resolution as “jet engines S,” in two versions, S-1 and S-2 (abbreviated as RDS-1 and RDS-2). RDS-1 meant the analog of the first U.S. plutonium-239 implosion type atomic bomb tested on 16 July 1945 in New Mexico RDS-2 signified the analog of the uranium-235 gun type bomb exploded over Hiroshima on 6 August 1945.