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About Portable Document Format (PDF) File

Filename extension: .pdf
Internet media type: application/pdf, application/x-pdf, application/x-bzpdf, application/x-gzpdf
Type code: 'PDF ' (including a single space)
Uniform Type Identifier: com.adobe.pdf
Magic number: %PDF
Developed by: Adobe Systems

Portable Document Format (PDF) is a file format created by Adobe Systems in 1993 for document exchange. PDF is used for representing two-dimensional documents in a manner independent of the application software, hardware, and operating system. Each PDF file encapsulates a complete description of a fixed-layout 2D document (and, with Acrobat 3D, embedded 3D documents using U3D) that includes the text, fonts, images, and 2D vector graphics which compose the documents.

Source: wikipedia.org

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