Microsoft Excel: This is a spreadsheet program that is used to edit and manipulate data. It ACTS in this video as the program where the PDF data is imported and edited. Removing it would mean the data cannot be edited as shown. PDF: This is a file format used to present documents. It APPEARS in this video as the source of the data. Removing it would mean there is no data to convert. Microsoft: This is the company that makes Excel. It APPEARS as a logo on the Excel program. Removing it would not change what happens in the video.