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PDF

Computing
portable document format: a format in which documents may be viewed
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

PDF

(computer science)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

PDF

This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

PDF

(Portable Document Format) The de facto standard for electronic document publishing from Adobe. Introduced in 1993, today there are billions of brochures, data sheets, white papers, forms and technical manuals on the Web in the PDF format.

Render, Save As and Edit
Adobe's free Acrobat Reader and many other applications can display and print PDF files. Various applications and conversion programs can save documents to PDF; however, editing them requires Adobe Acrobat or other software that specifically features PDF editing.

Non-Searchable Text
Most of the time, text within a PDF document can be searched as well as copied to another file. For copyright protection, PDFs can be saved as an image, which makes the text non-searchable and cumbersome to copy. 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.

Why PDFs Are Popular
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, 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. See PDF/X and font incompatibility.

PDF Is a Superset of Adobe PostScript
PDF is the preferred file format for sending documents to commercial print houses. If the commercial printer uses PDF imagesetters, no conversion is necessary. If it uses only PostScript hardware, the PDF files are converted to PostScript first. See PostScript, PDF/A, PDF/X, WWF, DjVu and XML Paper Specification.


PDFs Are Size Efficient
Compare the sizes of this PDF file with its JPEG and Microsoft Word (.doc and .docx) equivalents. These are all the same single-page text documents saved to four formats. 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).
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References in periodicals archive ?
In the case of a desktop-printer request, iCopyright.com takes a little longer -- still less than a minute -- to clear the license and prepare an Adobe Acrobat file using the Portable Document Format.
The cross-platform Acrobat file is next sent to the Pentagon, which then relays it through secure channels to Navy ships.
The program to create an Acrobat file costs about $200, but the program that allows users to see the files is free, and you can give this reader program to as many people as you want to see your files.
"The Acrobat file format is inherently revisable," he said, "and we'll do it in the next 18 months."
They may think they are providing an adequate level of security by using the built-in, password-protected encryption feature of Microsoft Office and Adobe Acrobat files. But this is not an optimal solution for several reasons.
By enhancing security controls for those collaborating with Autodesk files, as well as Acrobat files derived from Autodesk, enterprises can protect intellectual property and design ideas with greater confidence.
The new dataset follows the August release of an initial dataset offering, a 136.9 MB zip file containing the latest versions of everything from Microsoft Office and Adobe Acrobat files to image files.
Work product can be packed into Acrobat files and e-mailed to clients and colleagues for comments and approval.
Almost every computer in the world can open and display Acrobat files because Acrobat Reader is included in nearly all Web browsers and can be downloaded free from adobe.com.
By 2000, UMI Dissertation Services was able to provide copies of over one million theses and dissertations, with more than 100,000 available as Adobe Acrobat files. After its receiving university has accepted it, the electronic thesis or dissertation (ETD) is forwarded to UMI, which then creates an Adobe Acrobat version of the file that it provides to the supplying university.
Personal computer users have been urged to scan their PCs prior to 3 February 2006 to avoid being affected by the Nyxem-E Windows virus, which will reportedly delete Word, Excel, PowerPoint and Acrobat files on infected machines.