R is a language and environment for statistical computing and graphics. It is similar to S, which was developed at Bell Laboratories by John Chambers et al. It provides a wide variety of statistical and graphical techniques .

The R programming language, sometimes described as GNU S, is a programming language and software environment for statistical computing and graphics. It was originally created by Ross Ihaka and Robert Gentleman (hence the name R) at the University of Auckland, New Zealand, and is now developed by the R core team. R is considered by its developers to be an implementation of the S programming language, with semantics derived from Scheme.

In computational complexity theory, R is the class of decision problems solvable by a Turing machine, which is the set of all recursive languages. R is often identified with the class of 'effectively computable' functions (the Church-Turing thesis).

The R Broadway Local is a service of the New York City Subway. It is colored yellow on the route sign (either on the front and/or side - depending on equipment used) and on station signs and the NYC Subway map, as it represents a service provided on the BMT Broadway Line in Manhattan. Normal service is local from 71st-Continental Avenue in Forest Hills, Queens, to 95th Street in Bay Ridge, Brooklyn; during late nights it operates as a shuttle within Brooklyn from 36th Street to 95th Street.

R, the eighteenth letter of the English alphabet, is a vocal consonant. It is sometimes called a semivowel, and a liquid. See Guide to Pronunciation, §§ 178, 179, and 250-254.

the 18th letter of the Roman alphabet

(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole

the length of a line segment between the center and circumference of a circle or sphere

a unit of radiation exposure; the dose of ionizing radiation that will produce 1 electrostatic unit of electricity in 1 cc of dry air