INPUT (Process of understanding language) Listening Reading OUTPUT (Production) Speaking Writing INPUT is the information received in the target language(for example the second language). It can be written or spoken. OUTPUT refers to any spoken or written piece of information you produce using the second language. by: Analisa H. Rico One Saturday afternoon, two linguists visited Bicol University to prove something to the class of Dr. Norilyn De Chavez. The class was surprised as they enter the room. It’s getting hot here!!! Weh? Haha. You cannot acquire language without an input but you can acquire language without an output! :P