A contraction stress test is a test performed during pregnancy to verify whether or not the unborn babyâs heart is strong enough to withstand labor. It uses drugs or nipple stimulation to make the uterus temporarily contract in order to replicate labor contractions.
Graphical user interface. A graphical user interface (or GUI, often pronounced gooey), is a particular case of user interface for interacting with a computer which employs graphical images and widgets in addition to text to represent the information and actions available to the user.
An interface is an abstract type that is used to specify a contract that should be implemented by classes, which implement that interface. The interface keyword is used to define an interface and Implements keyword is used for implementing an interface by a class (in Java programming language).