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This is a category of articles relating to free software for making or viewing Portable Document Format (PDF) documents. That is, software which can be freely used, copied, studied, modified, and redistributed by everyone that obtains a copy. Typically, this means software which is distributed with a free software license, and whose source code ...
Free PDF software (1 C, 27 P) P. PDF readers (1 C, 16 P) Pages in category "PDF software" The following 35 pages are in this category, out of 35 total.
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Ghostscript is a suite of software based on an interpreter for Adobe Systems' PostScript and Portable Document Format (PDF) page description languages.Its main purposes are the rasterization or rendering of such page description language [4] files, for the display or printing of document pages, and the conversion between PostScript and PDF files.
Program card for an IBM 026 at the Computer History Museum. The lever at the top opened the metal clamp holding the card in place. The column-80 edge of the card was inserted under the clamp first. Small fingers on the right side of the clamp helped guide the column-1 edge into position. The lever was then rotated back to secure the card.
The initial design for type would be two-dimensional, but a punch has depth, and the three-dimensional shape of the punch, as well as factors such as the angle and depth to which it was driven into the matrix, would affect the appearance of the type on the page. The angle of the side of the punch was particularly significant.
A single program deck, with individual subroutines marked. The markings show the effects of editing, as cards are replaced or reordered. Many early programming languages, including FORTRAN, COBOL and the various IBM assembler languages, used only the first 72 columns of a card – a tradition that traces back to the IBM 711 card reader used on the IBM 704/709/7090/7094 series (especially the ...
The conversion of the design into a punch card was known as punching. Card reader fully automated schiffli embroidery machine by Saurer. Needle spacing, or pitch, limited the width of the embroidered design. The spacing between the needles is known as rapport. The unit for measuring spacing was the French inch (1.08 English inch).