The document discusses various types of computer applications and software. It defines an application as any program designed for end users. Examples provided include word processors, spreadsheets, web browsers, and database programs. It also discusses mobile apps and how they are designed for smartphones, tablets and other mobile devices. Popular mobile apps are described as those for social networking, games, music and videos. The document provides overviews of different types of software like word processors, spreadsheets, presentation software, graphics software, desktop publishing software, and more.