SUBSTITUTION

: ''For Wikipedia Template Substitution, see ''
'Substitution' is the replacement of one thing with another.
In 'mathematics':

★ Substitution rule, in calculus

★ The substitution method of solving simultaneous equations

★ Substitution property of equality, in mathematics

★ Substitution cipher, in cryptography

★ String substitution, in theoretical computer sicence
In 'science' and 'technology':

★ Substitution (chemistry), in organic chemistry

★ Substitution method, in the testing of optical fiber

★ Substitution mutation is synonymous with point mutation in genetics

★ Virtual Reality as a substitute for Reality
In 'economics':

★ Import substitution in trade

★ Substitute good, in consumer theory
In 'medicine':

★ Substitution therapy for opiates
In 'Analytic psychology':

★ It is a defence mechanism where a person replaces one feeling or emotion for another.
'Other' uses:

★ Chord substitution, in music

★ Substitution (law), a legal right to change a judge that may be biased.

★ Substitution (theatre), an acting methodology

★ Substitutes, in sport

★ Substitutionary Covenantal Representation in Biblical Theology