Linguistics .

the study of the rules for the formation of grammatical sentences in a language.

the study of the patterns of formation of sentences and phrases from words.

the rules or patterns so studied

English syntax.

a presentation of these

a syntax of English.

an instance of these

the syntax of a sentence.

Logic .

that branch of modern logic that studies the various kinds of signs that occur in a system and the possible arrangements of those signs, complete abstraction being made of the meaning of the signs.

the outcome of such a study when directed upon a specified language.

a system or orderly arrangement.

Computers . the grammatical rules and structural patterns governing the ordered use of appropriate words and symbols for issuing commands, writing code, etc., in a particular software application or programming language.

noun

arrangement , order , pattern , structure , system