PDF (Portable Document Format), is not just a well-known and convenient format, but the only one that has been standard since 2008. It was developed by the Adobe Systems team. The developers of the format set themselves the task of creating such a format for displaying the document so that the document opens and looks the same on any device. The PDF format is used for storing and transmitting text and graphic information on the network, for example, for transferring letterhead to the printing industry or posting a questionnaire on the website. Great for demonstrating developments: easy to show, edit - difficult. This complicates the theft of intellectual property. Well, the ideas of a "paperless office" are received with a bang by everyone who thinks about ecology on the planet.
The DOC file is a Microsoft Word document, without a doubt the most popular word processing program. Word is included with all versions of the Microsoft Office suite. DOC files contain a variety of information with formatted text - fonts, text alignment, indentation, paragraphs, lists, columns, etc. Microsoft Word documents can also include images, charts, tables, scripts. In addition to various objects, text and information about its formatting, the DOC file contains the parameters of the document itself, printing. Starting with Microsoft Word 2007, the default .DOCX format is used for new documents. To open the DOC file, they use not only the official office suite of applications, but also many other programs that open text files and support the DOC file extension, for example, Google Docs, Corel WordPerfect and others. Microsoft also has free programs for viewing and editing text files, such as Word Viewer and Microsoft Works.