NA, N.A., Na, nA or n/a may refer to:

Chemistry and physics

Biology and medicine

Places

Current

Historical

  • Netherlands Antilles (former international vehicle registration code: NA)
  • Na (Chinese state), a small state of the Chinese Zhou dynasty from the 11th to 8th centuries BC
  • Nakoku, or Na, a state in Kyūshū, Japan from the 1st to early 3rd centuries AD

Names and titles

Art and entertainment

Transport

Language

Organizations

Other uses

See also

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