PDF (Portable Document Format) is a versatile electronic document format. It was initiated by Adobe and was originally intended for electronic presentation of printed materials. Hence, the tasks of this format follow - storing information about the color scheme and the arrangement of elements, as well as ensuring identical output on different monitors and printers. PDF documents can be opened using the free version of Adobe Reader or a web plug-in that is available for most Internet browsers. In some browsers, in particular, in Google Chrome, this format is supported even without the plugin installed. You can edit PDF files using the paid version of Adobe Reader. Also, there are a huge number of programs for both opening and working with this format, and for converting to other formats.
The PPT or PPTX file is a presentation created by the Microsoft Office PowerPoint software package, which is designed not only for forming, but also for conducting a variety of presentations. This software is supported under the Mac OS and Windows operating systems. The file format can contain a certain number of slides, text information and graphic elements. It is possible to add special effects in the process of switching slides. Users prefer to add images and various types of accompanying fonts to PPT/PPTX. To open the file, it is enough to have installed office suites from Microsoft; if such a utility is not available on your computer, you can use the free Microsoft PowerPoint Viewer. Do not forget that you can work with PPT files using LibreOffice, Corel WordPerfect Office, Apache OpenOffice, etc.