CA1
{{wiktionary|ca1}}
CA1, CA-1, CA 1, or Ca.1 may refer to:
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Aircraft and other vehicles
- Buhl CA-1 Airster, an American sports airplane
- Caproni Ca.1 (1910), an experimental biplane of 1910
- Caproni Ca.1 (1914), a World War I bomber
- Schneider CA1, the first French tank
Biology
- CA1 (gene), a human gene
- CA1, a hippocampal subfield
Law
Places and roads
- the road designation for the Central American Highway 1 (CA-1), the portion of the Pan-American Highway passing through the Central American countries
- California State Route 1
Politics
{{Letter-number combination disambiguation}}