Explanation:

Two types of computer operating system user interfaces are CLI and GUI. CLI stands for the command-line interface. In a command-line interface, a user enters commands at a prompt using a keyboard. The second type is the GUI or graphical user interface. With this type of user interface, a user interacts with the operating system by working with icons and menus. A mouse, finger, or stylus can be used to interact with a GUI. PnP is the name of a process by which an OS assigns resources to different hardware components of a computer. The other answers are examples of Application Programming Interfaces or APIs.