The files downloaded by the electronic tax bureau are opened with pdf document software. Pdf is a portable document format or electronic file format. This file format has nothing to do with the operating system platform, that is, PDF files are common in Windows, Unix and Apple's Mac OS operating systems.

Pdf document introduction

Pdf is a file format developed by Adobe Systems for file exchange, which is independent of applications, operating systems and hardware. PDF file is based on PostScript language image model, which can ensure accurate color and accurate printing effect on any printer, that is, PDF will faithfully reproduce every character, color and image of the manuscript.

This feature makes it an ideal document format for electronic document distribution and digital information dissemination on the Internet. More and more e-books, product descriptions, company announcements, online materials and emails are using PDF files.

The purpose of PDF file format is to support cross-platform and multimedia integrated information publishing, especially for network information publishing. In order to achieve this goal, PDF has many incomparable advantages over other electronic document formats.

PDF file format can encapsulate text, font, format, color, graphics and images in one file independent of device and resolution. Format files can also contain hypertext links, sounds, dynamic images and other electronic information, support super-long files, and are highly integrated, safe and reliable.