Answer:
The rest don't exist. And the correct answer is Application Program Interface - A well-documented library of functions provided in a programming language that helps to simplify complex programming tasks.
Step-by-step explanation:
The above one is definitely the correct answer as its the only one mentioned in the above list that exists. Rest of the definitions don't exist really. Hence the above answer. And it is definitely the API which is a library of functions like we can have an API for credit cards, and also like we can have one for library management, and so on. The list can be very long, and its quite interesting to find them and use them in our programming, as it makes our task easier,