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As with Adobe Acrobat, Nitro PDF Pro's reader is free; but unlike Adobe's free reader, Nitro's free reader allows PDF creation (via a virtual printer driver, or by specifying a filename in the reader's interface, or by drag-'n-drop of a file to Nitro PDF Reader's Windows desktop icon); Ghostscript not needed. PagePlus: Proprietary: No
Original file (SVG file, nominally 85 × 75 pixels, file size: 660 bytes) This is a file from the Wikimedia Commons . Information from its description page there is shown below.
PDF 2.0 defines 256-bit AES encryption as the standard for PDF 2.0 files. The PDF Reference also defines ways that third parties can define their own encryption systems for PDF. PDF files may be digitally signed, to provide secure authentication; complete details on implementing digital signatures in PDF are provided in ISO 32000-2.
PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...
The main Metrorail route between Pretoria in the north and Johannesburg via Germiston in the south has a station in Thembisa east, namely the Oakmoor station. Just south of the Oakmoor station is a branch rail which heads north-west into the township, with the stations on the branch rail being Thembisa in the east, Limindlela in the center and Leralla in the west.
Avogadro's law provides a way to calculate the quantity of gas in a receptacle. Thanks to this discovery, Johann Josef Loschmidt, in 1865, was able for the first time to estimate the size of a molecule. [9] His calculation gave rise to the concept of the Loschmidt constant, a ratio between macroscopic and atomic quantities.