Why are PDF files so popular?

what is the most popular format on the internet today? From the format of papers submitted by international academic conferences to electronic publications on the Internet, Adobe's PDF format has become the mainstream of file formats in the Internet age. If a school or teacher wants to show your work online, it's best to use PDF format. This should be considered from now on, so as to avoid wasting your teaching resources in the future.

PDF(Portable Document Format) is a structured document format. It was first published by Adobe Company, a famous American typesetting and image processing software company, in 1993. At the end of 1997, the International Organization for Standardization began to consider PDF as an international standard.

PDF files can contain interactive objects such as hyperlinks and interactive forms, and also have the ability to describe beautiful layouts. The strict structure definition of PDF allows applications to randomly access the objects in it. For example, to access any page in a document, access to each page in PDF is equally fast.

as we all know, HTML format is the main form of information distribution on the Internet at present. It can describe the basic style of Web pages, with pictures and texts, and has interactive and hyperlink functions. Like HTML, PDF has the function of form interaction and hyperlink, but it is different from HTML. PDF realizes the unification of paper printing and electronic publishing. If the typeset content is saved as a PDF file, it can be delivered for printing and distributed on the Internet (appropriate interactive content needs to be added). Unlike some current campus network management practices, two groups of people are needed, one for typesetting paper printing, and the other for creating HTML documents for electronic publishing, resulting in repeated waste of resources and manpower.

the PDF format is platform-independent, and the pdf file has the parallelism of software and hardware. The format and content of PDF files seen by users in different environments (such as different language operating systems and different hardware platforms) are exactly the same as when the author finished his creation. This feature is very suitable for global information exchange, and avoids the problem that the Chinese characters in mainland China, Hong Kong and Taiwan are coded differently and the letters in Europe and the United States are different to produce garbled codes. Moreover, PDF files can bring their own fonts or font description information, including font description information such as font specifications and sizes, and can simulate fonts when fonts do not exist in different users' systems, and correctly display file contents, which is especially suitable for publishing information to the whole world on the Internet.

the p>PDF format supports multimedia sound and animation, making your webpage a multimedia electronic reading with pictures and texts. It also supports random access to the page and continuous modification, which is convenient for the author to make a few modifications at any time and improve efficiency. The security feature system of PDF format is excellent, which supports various levels of security, such as reading only, not printing and selecting words; Readable and printable, but not modifiable; Readable, printable, modifiable, etc. This security control is very important to protect the rights and interests of websites and the copyright of electronic publications.

PDF files use the industrial standard compression algorithm, which is smaller than other file formats transmitted on the network and easier to transmit and store; It is precisely because of the advantages of PDF file that it is gradually loved by people in making CD-ROM electronic publications, building websites by mixing with HTML, independently using PDF to make home pages and publishing information, and has now become a universal format accepted by people all over the world on the Internet.