The two-character abbreviation for the state of California is "CA." This abbreviation is commonly used in postal addresses, government documents, and state identification. California is recognized for its diverse geography, including beaches, mountains, and forests, as well as its significant cultural and economic influence within the United States and globally. The state is home to major cities like Los Angeles, San Francisco, and San Diego and is known for its entertainment industry, technology sector, and agricultural production, making it one of the largest economies in the world.