Image files that employ JPG compression are commonly called 'JPG files' and are stored in variants of the JIF image format. A structured storage system bundles these elements and any associated content into a single file, with data compression where appropriate.

A font-embedding/replacement system to allow fonts to travel with the documents. The PDF combines three technologies: A subset of the PostScript page description programming language for generating the layout and graphics. JPG typically achieves 10:1 compression with little perceptible loss in image quality. The degree of compression can be adjusted, allowing a selectable tradeoff between storage size and image quality.

JPG is a commonly used method of lossy compression for digital images, particularly those produced by digital photography.

Each PDF file encapsulates a complete description of a fixed-layout flat document, including the text, fonts, graphics, and other information needed to display it. The Portable Document Format (PDF) is a file format used to present documents independent of application software, hardware, and operating systems. Application/pdf, application/x-pdf, application/x-bzpdf, application/x-gzpdf

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