1 Freeware is in contrast to commercial software,
Usage rights such as source code being withheld or redistribution Whereas the PDF and Word formats are aware of the file's contents, the JPEG image is always a matrix of pixels (see JPEG and DOC file).NO, they are not legal, at-least not always.įreeware (portmanteau of "free" and "software") is software that isĪvailable for use at no monetary cost, but with one or more restricted These are all the same single-page text documents saved to four formats. See PostScript, PDF/A, PDF/X, WWF, DjVu and XML Paper Specification.Ĭompare the sizes of this PDF file with its JPEG and Microsoft Word (.doc and. If it uses only PostScript hardware, the PDF files are converted to PostScript first. If the commercial printer uses PDF imagesetters, no conversion is necessary. PDF is the preferred file format for sending documents to commercial print houses. However, with PDFs, document designers are free to choose whichever fonts they have at their disposal because the fonts are embedded within the PDF file itself and do not violate copyrights and patents. Years ago, documents contained only a couple of basic fonts in order to display accurately because they relied on the installed fonts in the rendering device. However, PDF programs may offer an optical character recognition (OCR) feature that creates a text layer from the images, and that text can be searched. For copyright protection, PDFs can be saved as an image, which makes the text non-searchable and cumbersome to copy.
Most of the time, text within a PDF document can be searched as well as copied to another file. Various applications and conversion programs can save documents to PDF however, editing them requires Adobe Acrobat or other software that specifically features PDF editing.
Introduced in 1993, today there are billions of brochures, data sheets, white papers, forms and technical manuals on the Web in the PDF format.Īdobe's free Acrobat Reader and many other applications can display and print PDF files. This article is provided by FOLDOC - Free Online Dictionary of Computing ( ) PDF( Portable Document Format) The de facto standard for electronic document publishing from Adobe.
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