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 txt format refers to documents of a text type, the content of which is plain text, respectively, these files can be opened with almost all text editors, for example, such as Notepad. Most other programs also open text files, for example, any browser - Internet Explorer, Chrome or Firefox. Opening text files on mobile devices and other operating systems is not a problem. The TXT format is the most common format for storing and transmitting text data after Doc. TXT file can be a formatted or unformatted block of text information, implemented as a sequence of lines. Formatting tools can be applied to any text block of such information and set: the size and style of writing the font, the amount of line spacing, as well as other style elements depending on the needs of the user.