doc, docx, pdf what format is this?

PDF (short for Portable Document Format, meaning "Portable Document Format") is a file format developed by Adobe Systems for file exchange in a manner independent of applications, operating systems, and hardware.

PDF files are based on the PostScript language image model, which ensures accurate colors and accurate printing effects no matter what kind of printer is used. That is, PDF will faithfully reproduce every character, color, and image of the original document.

PDF is mainly composed of three technologies: · Derived from PostScript, used to generate and output graphics; · Font embedding system, which allows fonts to be transmitted along with the file; doc Chinese: document (foreign language abbreviation: DOC, foreign language full name: Document)

It is a common file extension for computer files. After the 2007 version, it is: docx.

This format was originally used for plain text files, and is mostly found in the instructions for use of software and hardware in different operating systems.

.doc is a common extension for computer files.

This format was originally used for pure text files and is mostly found in different operating systems and software and hardware instructions.

By the 1990s, Microsoft used .doc as the extension in the word processing software Word, and it became a popular format, while the former's plain text format was almost extinct.

Microsoft's "doc" format is its own proprietary format. Its files can accommodate more text formats, scripting languages, recovery and other information than other file formats such as RTF, HTML, etc., but because this format is

Closed format, so its compatibility is also low.

In the Palm OS system, ".doc" is the extension used by PalmDoc, a completely unrelated format, mainly used for encoding electronic books.

Docx is used by Microsoft Office 2007 and later, replacing its current proprietary default file format with a new XML-based compressed file format, adding the letter x after the traditional file name extension (that is, .docx replaces .doc, .

xlsx replaces .xls etc.).

Docx files take up less space than doc files. For example, the fast pdf converter I use can convert these documents.

They are all office tools.