Office includes applications like Word for word processing, Excel for working with spreadsheets, and PowerPoint for creating slideshow presentations. Microsoft Office, for example, is a collection of applications designed to work in conjunction with each other to make it easier for you to accomplish tasks and get things done. If you often have to move between different types of tasks for work like writing documents, creating spreadsheets, putting together presentations, and handling your calendar, you could do all of these things with several individual apps from multiple software developers, but it often makes more sense to work with apps that have been designed to work together, giving you the ability to move seamlessly between them.