CA

CA is a common abbreviation with several unrelated meanings in geography, industry, and science. Notable uses include California, a Chartered Accountant, the chemical symbol for calcium, Central America, and the ISO country code for Canada, among others.

California, abbreviated CA, is a state on the West Coast of the United States and the most populous U.S. state.

Chartered Accountant is a professional designation for accountants in many Commonwealth countries, focusing on accounting, auditing, and financial reporting.

Calcium, chemical element with symbol Ca and atomic number 20, is an essential mineral for bone and teeth formation; it is abundant in dairy products and fortified foods.

A certificate authority is a trusted entity in digital security that issues and manages digital certificates used to verify identities and enable encrypted communication.

Central America refers to the region between North and South America, comprising seven countries: Belize, Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua, and Panama.

CA is also the ISO 3166-1 alpha-2 country code for Canada and the country-code top-level domain .ca.