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The word scheme is similar to schema, and thus has numerous meanings based on the area of expertise and context of the user.

See conceptual scheme[?].

In the context of programming languages, the Scheme programming language is a streamlined variant of the Lisp programming language. It was originally to be called "Schemer," but the operating system on which it was first implemented had a six-character file name limit, so it was renamed "Scheme."

In mathematics, a scheme is a topological space together with commutative rings for all its open sets, which arises from "glueing together" spectra (spaces of prime ideals) of commutative rings. It is an important concept connecting the fields of algebraic geometry, commutative algebra and number theory. Schemes were introduced by Alexander Grothendieck.

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