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| Name | LRF | |
| Full name | Sony Portable Reader File | PDF - Portable Document Format |
| File extension | .lrf | |
| MIME type | application/x-sony-bbeb | application/pdf, application/x-pdf, application/x-bzpdf, application/x-gzpdf |
| Developed by | Sony | Adobe Systems |
| Type of format | eBook File | Document format |
| Description | The LRF file type is a proprietary file type created by Sony for use with Sony branded eBook readers. LRF, along with LRS and LRX made up the now defunct BroadBand eBook or BBeB. The file type was discontinued in 2010 with the Sony eBook store selling in the ePUB format. | The Portable Document Format (PDF) is a file format used to present documents in a manner independent of application software, hardware, and operating systems. 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. |
| Technical details | LRF files are compressed, unencrypted files that may contain text and images featuring Sony's DRM protection. An LRF file may contain one or many LRS files which contain XML structuring. | The PDF combines three technologies: A subset of the PostScript page description programming language, for generating the layout and graphics. A font-embedding/replacement system to allow fonts to travel with the documents. A structured storage system to bundle these elements and any associated content into a single file, with data compression where appropriate. |
| Associated programs | Sony Reader | Adobe Acrobat, Adobe InDesign, Adobe FrameMaker, Adobe Illustrator, Adobe Photoshop, Google Docs, LibreOffice, Microsoft Office, Foxit Reader, Ghostscript. |
| Wiki | http://en.wikipedia.org/wiki/BBeB | https://en.wikipedia.org/wiki/Portable_Document_Format |