CA1, CA-1, CA 1, or Ca.1 may refer to:

Aircraft and other vehicles

Buhl CA-1 Airster The Buhl CA-1 Airster was a sports airplane developed in the United States in 1930. It was a conventional low-wing cantilever monoplane with fixed tailwheel undercarriage and an open cockpit for the pilot. History In 1930 the Buhl Aircraft C ...

, an American sports airplane *

Caproni Ca.1 (1910) The Caproni Ca.1 was an Experimental aircraft, experimental biplane built in Italy in 1910. It was the first aircraft to be designed and built by aviation pioneer Gianni Caproni, although he had previously collaborated with Henri Coandă on sai ...

, an experimental biplane of 1910 * Caproni Ca.1 (1914), a World War I bomber *

Schneider CA1 The Schneider CA 1 (originally named the Schneider CA) was the first French Third Republic, French tank, developed during the First World War. The Schneider was inspired by the need to overcome the stalemate of trench warfare which on the Wester ...

, the first French tank

Biology

CA1 (gene) Carbonic anhydrase 1 is an enzyme that in humans is encoded by the ''CA1'' gene. Carbonic anhydrases (CAs) are a large family of zinc metalloenzymes that catalyze the reversible hydration of carbon dioxide. They participate in a variety of biolo ...

, a human gene * CA1, a

hippocampal subfield The hippocampal subfields are four subfields CA1, CA2, CA3, and CA4 that make up the structure of the hippocampus. Regions described in the hippocampus are the head, body, and tail, and other hippocampal subfields include the dentate gyrus, the ...

Law

United States Court of Appeals for the First Circuit The United States Court of Appeals for the First Circuit (in case citations, 1st Cir.) is a federal court with appellate jurisdiction over the district courts in the following districts: * District of Maine * District of Massachusetts ...

Places and roads

* the road designation for the Central American Highway 1 (CA-1), the portion of the

Pan-American Highway The Pan-American Highway is a vast network of roads that stretches about 30,000 kilometers (about 19,000 miles) from Prudhoe Bay, Alaska, in the northernmost part of North America to Ushuaia, Argentina, at the southern tip of South America. I ...

passing through the Central American countries *

California State Route 1 State Route 1 (SR 1) is a major north–south state highway A state highway, state road, or state route (and the equivalent provincial highway, provincial road, or provincial route) is usually a road that is either Route number, ...

Politics

California's 1st congressional district California's 1st congressional district is a List of United States congressional districts, U.S. congressional district in California. Doug LaMalfa, a Republican Party (United States), Republican, has represented the district since January 2013. ...

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