Gui programmers sometimes refer to screen space as

Under which key category do the page up and page down keys fall? page up and page down keys fall under the keys category.

What is wi-fi infrastructure? a metropolitan area network that uses radio signals to transmit and receive data a communications technology aimed at providing high-speed wireless data over metropolitan area networks a means by which portable devices can connect wirelessly to a local area network, using access points that send and receive data via radio waves includes the inner workings of a wi-fi service or utility, including the signal transmitters, towers, or poles and additional equipment required to send out a wi-fi signal

Java the manager of a football stadium wants you to write a program that calculates the total ticket sales after each game