a programming language whose expressions are represented by strings of characters

One-Dimensional Man: Studies in the Ideology of Advanced Industrial Society is a 1964 book by the German–American philosopher and critical theorist Herbert Marcuse, in which the author offers a wide-ranging critique of both the contemporary capitalist society of the Western Bloc and the communist society of the Soviet Union, documenting the parallel rise of new forms of social repression in both of these societies, and the decline of revolutionary potential in the West.

A one-dimensional space (1D space) is a mathematical space in which location can be specified with a single coordinate.

In quantum mechanics, the particle in a one-dimensional lattice is a problem that occurs in the model of a periodic crystal lattice.