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Rb or RB may stand for:

Arts and entertainment[edit]


Government and politics[edit]

Science and technology[edit]


Other uses in science and technology[edit]

  • .rb, the file extension for documents created in Ruby or in REAL Basic
  • Rebar (short for reinforcing bar), used in reinforced concrete structures
  • Retinoblastoma, a childhood cancer of the eyes caused by a mutation in the retinoblastoma protein
  • Retinoblastoma protein, a tumor suppressor protein
  • Rubidium, a chemical element


Other uses[edit]