Answer:
Application Programming Interface.
Explanation:
Application Programming Interface(API) is a collection of function, routines, procedures and the protocol which are used create a software application.The main role of API is that it defined or specified how the components of software will interact.
The objective of the Application Programming Interface that it the manufacturer or develop software that is running on system or device. The advantage of using the Application Programming Interface is that we can develop a better program in a very manner by using the API.