1, The full form of CA is Canada. It’s used on Regional ,Countries in Canada

Canada (ISO 3166 code: CA) is a country in northern North America.

Canada is a country in the northern part of North America. Its ten provinces and three territories extend from the Atlantic to the Pacific and northward into the Arctic Ocean, covering 9.98 million square kilometres, making it the world’s second-largest country by total area.

2, The full form of CA is California. It’s used on Regional ,Postal Codes in United States

California (Postal abbreviation: CA) is a state located on the West Coast of the United States.

California, a western U.S. state, stretches from the Mexican border along the Pacific for nearly 900 miles. Its terrain includes cliff-lined beaches, redwood forest, the Sierra Nevada Mountains, Central Valley farmland and the Mojave Desert. The city of Los Angeles is the seat of the Hollywood entertainment industry. Hilly San Francisco is known for the Golden Gate Bridge, Alcatraz Island and cable cars. 

3, The full form of CA is Chartered Accountant. It’s used on Business ,Job Titles in Worldwide

Chartered Accountant (CA) is an accounting designation given to accounting professionals.

Chartered Accountant is a designation given to an accounting professional who has received certification from a statutory body that he/she is qualified to take care of the matters related accounting and taxation of a business, like file tax returns, audit financial statements and business practices, maintaining records of investments, preparing and reviewing financial reports and documents. A Chartered Accountant is also qualified to offer advisory services to clients which include companies and individuals.

Becoming a certified Chartered Accountant requires completing three levels of training designed by the Institute of Chartered Accountants of India (ICAI). The ICAI, is a statutory body which regulates and maintains the profession of chartered accountancy in India. Under the Scheme of Education and Training, a candidate can pursue Chartered Accountancy Course either through, Foundation Course Route or Direct Entry Route. Foundation course is the entry point into the course after Class 12, while Direct Entry is for those who have completed Graduation.

4, The full form of CA is Air China. It’s used on Transport & Travel ,Airline Codes in China

Air China (IATA: CA, ICAO: CCA, Callsign: AIR CHINA) is the flag carrier and one of the major airlines of the People’s Republic of China.

Air China Limited (Chinese: 中国国际航空公司) is the flag carrier of the People’s Republic of China and one of the “Big Three” mainland Chinese airlines (alongside China Southern Airlines and China Eastern Airlines). Air China’s headquarters are in Shunyi District, Beijing. Air China’s flight operations are based primarily at Beijing Capital International Airport. In 2017, the airline carried 102 million domestic and international passengers with an average load factor of 81%

5, The full form of CA is Cricket Australia. It’s used on Sports & Games ,Cricket in Australia

Cricket Australia (CA), formerly known as the Australian Cricket Board, is the governing body of cricket in Australia.

6, The full form of CA is Certificate Authority. It’s used on Computing ,Security in Worldwide

Certificate Authority (CA) or Certification Authority, is an entity that issues digital certificates used to create digital signatures and public-private key pairs.

In cryptography, a certificate authority or certification authority (CA) is an entity that issues digital certificates. A digital certificate certifies the ownership of a public key by the named subject of the certificate. This allows others (relying parties) to rely upon signatures or on assertions made about the private key that corresponds to the certified public key. A CA acts as a trusted third party—trusted both by the subject (owner) of the certificate and by the party relying upon the certificate. The format of these certificates is specified by the X.509 or EMV standard.

7, The full form of CA is Carlisle. It’s used on Regional ,Postal Codes in United Kingdom

Carlisle (Postcode area: CA) is a city in the north of England near the border with Scotland.

8, The full form of CA is Chromatic Aberration. It’s used on Academic & Science ,Physics in Worldwide

Chromatic Aberration (CA) is an aberration in an optical system that causes light of different colours to be focused in different planes.

Chromatic aberration (also known as color fringing or dispersion) is a common problem in lenses which occurs when colors are incorrectly refracted (bent) by the lens, resulting in a mismatch at the focal point where the colors do not combine as they should.

To help understand this a bit better, remember that the focal plane is your sensor’s point of focus; where all the light from your lens should rejoin together to be correctly detected by your sensor. The thing is, depending on the construction of your lens, your chosen focal length, and even the aperture that you’ve used, certain wavelengths (colors) may arrive at points before or after where the focal plane sits.

9, The full form of CA is Canada (TLD). It’s used on Computing ,Domain Names (TLD) in Canada

.ca is the Internet country code top-level domain (ccTLD) for Canada.