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  2. Aperture card - Wikipedia

    en.wikipedia.org/wiki/Aperture_card

    Aperture cards are used for engineering drawings from all engineering disciplines. The U.S. Department of Defense once made extensive use of aperture cards, and some are still in use, but most data is now digital. [2] Information about the drawing, for example the drawing number, could be both punched and printed on the remainder of the card.

  3. Engineering drawing abbreviations and symbols - Wikipedia

    en.wikipedia.org/wiki/Engineering_drawing...

    The issuance of a drawing from the engineering/design activity to the production activity. In other words, the event when a draft becomes a completed, official document. A stamp on the drawing saying "ISSUED" documents that RTP has occurred. RTV: room-temperature vulcanizing; return to vendor: 1. RTV sealants, a way to seal joints. 2.

  4. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    There are many PDF print drivers for Microsoft Windows, the pdfTeX typesetting system, the DocBook PDF tools, applications developed around Ghostscript and Adobe Acrobat itself as well as Adobe InDesign, Adobe FrameMaker, Adobe Illustrator, Adobe Photoshop, that allow a "PDF printer" to be set up, which when selected sends output to a PDF file ...

  5. Computer programming in the punched card era - Wikipedia

    en.wikipedia.org/wiki/Computer_programming_in...

    (An alternative, imperfect but commonly employed technique to maintain proper card order was to draw one or more diagonal stripes across the top edge of all the cards in a deck.) In later years, as punch card data was converted to magnetic tape files the sequence numbers were often used as a column in an array as an index value that can be ...

  6. Punched card - Wikipedia

    en.wikipedia.org/wiki/Punched_card

    Cards would typically be punched with some initial information, such as the name and location of an inventory item. Information to be added, such as quantity of the item on hand, would be marked in the ovals. Card punches with an option to detect mark sense cards could then punch the corresponding information into the card.

  7. Outline of drawing and drawings - Wikipedia

    en.wikipedia.org/wiki/Outline_of_drawing_and...

    Elements of art – group of aspects of a work of art used in teaching and analysis, in combination with the principles of art. They are texture, form, line, color, value, and shape. Perspective – the principle of creating the illusion of 3-dimensionality on a 2-dimensional source such as paper.

  8. Tube drawing - Wikipedia

    en.wikipedia.org/wiki/Tube_drawing

    Tube sinking, also known as free tube drawing, reduces the diameter of the tube without a mandrel inside the tube. The inner diameter is determined by the inner and outer diameter of the stock tube, the outer diameter of the final product, the length of the die landing, the amount of back tension, and the friction between the tube and the die. [3]

  9. Chad (paper) - Wikipedia

    en.wikipedia.org/wiki/Chad_(paper)

    Chad refers to fragments sometimes created when holes are made in a paper, card or similar synthetic materials, such as computer punched tape or punched cards. The word "chad" has been used both as a mass noun (as in "a pile of chad") and as a countable noun (pluralizing as in "many chads").