K&R

K&R may refer to:

• Kernighan and Ritchie (Brian Kernighan and Dennis Ritchie)
• The C Programming Language (book), a book written by Brian Kernighan and Dennis Ritchie
• K&R C, the original dialect of the C programming language, introduced by the first edition of the book
• K&R indent style, used in the book
• K&R Insurance, a kidnap and ransom insurance