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18A (disambiguation)
Reference material by Wikipedia contributors. This retains its source identity and is not 411 news reporting.
The 18A was a 2013 Argentine protest demonstration.
18A, 18-A, 18a or XVIII-A may also refer to:
Air & Space 18A, a 1965 United States gyroplane
Eighteen angstrom, a marketing term for a sub-2 nm process
Highway 18A (Ontario)
Nevada State Route 18A
Soyuz 18a, a 1975 Soviet spacecraft mission
Stalag XVIII-A, a German prisoner of war camp
Volkswagen Type 18A, a 1949 special version made for the German police