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  2. PNG - Wikipedia

    en.wikipedia.org/wiki/PNG

    In ASCII, the letters PNG, allowing a person to identify the format easily if it is viewed in a text editor. 0D 0A. A DOS -style line ending (CRLF) to detect DOS-Unix line ending conversion of the data. 1A. A byte that stops display of the file under DOS when the command type has been used—the end-of-file character.

  3. World file - Wikipedia

    en.wikipedia.org/wiki/World_file

    Definition. Graphical view of world files parameters and computed values of the four first upper left pixels of an image. The generic meaning of the six parameters in a world file (as defined by Esri [ 1]) is: Line 1: A: pixel size in the x -direction in map units/pixel. Line 2: D: rotation about y -axis.

  4. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    A PDF file is often a combination of vector graphics, text, and bitmap graphics. The basic types of content in a PDF are: Typeset text stored as content streams (i.e., not encoded in plain text ); Vector graphics for illustrations and designs that consist of shapes and lines;

  5. Engineering drawing abbreviations and symbols - Wikipedia

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

    EO, ECO, ECN. engineering order. An order from the engineering department (to be followed by the production department or vendor) overriding/superseding a detail on the drawing, which gets superseded with revised information. Also called by various other names, such as engineering change order (ECO), engineering change notice (ECN), drawing ...

  6. Science - Wikipedia

    en.wikipedia.org/wiki/Science

    Science is a strict systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the world. [1] [2] Modern science is typically divided into three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; the social sciences (e.g., economics, psychology, and sociology), which study ...

  7. AOL Mail

    mail.aol.com

    Explore our AOL Mail product page to learn even more. Start for free. Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  8. GIF - Wikipedia

    en.wikipedia.org/wiki/GIF

    Website. www .w3 .org /Graphics /GIF /spec-gif89a .txt. The Graphics Interchange Format ( GIF; / ɡɪf / GHIF or / dʒɪf / JIF, see § Pronunciation) is a bitmap image format that was developed by a team at the online services provider CompuServe led by American computer scientist Steve Wilhite and released on June 15, 1987.

  9. Doc (computing) - Wikipedia

    en.wikipedia.org/wiki/Doc_(computing)

    Yes. .doc (an abbreviation of "document") is a filename extension used for word processing documents stored on Microsoft 's proprietary Microsoft Word Binary File Format; it was the primary format for Microsoft Word until the 2007 version replaced it with Office Open XML .docx files. [ 4] Microsoft has used the extension since 1983.