Definition:

Psycholinguistics:
is the study of how a listener recognize words and utterances, or how damage to our brains results in certain kind of language disorders.


Applied Linguistics
A branch of linguistics where we study how to learn and to teach different languages.

Sociolinguistics:
The study of the relation between language and society and the different varieties of language people use


Artificial intelligence:
The study of how to make computers more sophisticated