C may refer to:

1. C (programming language): A high-level programming language developed in the 1970s. It is widely used for building software applications and is known for efficiency and close-to-hardware programming capabilities.

2. Celsius: A unit of temperature measurement commonly used in many countries

where water freezes at 0 degrees Celsius and boils at 100 degrees Celsius.

3. Speed of light in a vacuum: In physics

c is the symbol used to represent the speed of light in a vacuum

which is approximately 299

792

458 meters per second.

4. Roman numeral for 100: In Roman numerals

C represents the number 100.

5. The third note in the musical scale: In music theory

C is the third note in the C-major scale

also known as the "do" note.

6. Century: C is sometimes used as an abbreviation for the word "century

" representing a period of 100 years.

7. Carbon: C is the chemical symbol for carbon

an abundant element found in all living things.

8. Consonant: In linguistic terms

C represents a consonant sound.