Computational linguistics

Computational Linguistics is a field of linguistics that deals with making computers understand human language. Some of the biggest sub-fields of computational linguistics are:

Speech recognition, which is a computer program that listens to people talk and writes down what they said

Speech synthesis, which is a computer program that takes writing and reads it out loud

Machine translation, which is a computer program that turns a language into a different one

Dialog Systems, which is a computer program that talks with a human to help them do something