This presentation discusses installing application software. It defines software as programs that enable computers to perform specific tasks, whether system software like operating systems or application software for tasks like word processing. Application software examples are provided. There are trial versions with limited functionality and time limits, as well as licensed versions that are purchased. Software compatibility refers to different programs operating satisfactorily together on the same or linked computers. The presentation provides definitions of software and different types, as well as trial versus licensed versions and compatibility.