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  2. Blackboard - Wikipedia

    en.wikipedia.org/wiki/Blackboard

    Uses. Reusable writing surface on which text or drawings are made. A blackboard or a chalkboard is a reusable writing surface on which text or drawings are made with sticks of calcium sulphate or calcium carbonate, known, when used for this purpose, as chalk. Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.

  3. Avro Keyboard - Wikipedia

    en.wikipedia.org/wiki/Avro_Keyboard

    Avro Keyboard (Bengali: অভ্র কিবোর্ড) is a free and open source graphical keyboard software developed by OmicronLab for the Microsoft Windows, Linux, MacOS, and several other software additionally adapted its phonetic layout for Android and iOS operating system.

  4. Do Not Erase: Mathematicians and Their Chalkboards

    en.wikipedia.org/wiki/Do_Not_Erase:...

    Writing from the point of view as a mathematician, Adhemar Bultheel calls it "a wonderful mirror" that could help other mathematicians think about what they do, while Elizaveta Dubrovina finds it to be "a nostalgic reminder of the tactility of chalk and the conviviality of in-person collaboration" in what has become a largely online world, her ...

  5. Overhead projector - Wikipedia

    en.wikipedia.org/wiki/Overhead_projector

    Overhead projector. An overhead projector (often abbreviated to OHP ), like a film or slide projector, uses light to project an enlarged image on a screen, allowing the view of a small document or picture to be shared with a large audience. In the overhead projector, the source of the image is a page-sized sheet of transparent plastic film ...

  6. Slate (writing) - Wikipedia

    en.wikipedia.org/wiki/Slate_(writing)

    The writing slate consisted of a piece of slate, typically either 4x6 inches or 7x10 inches, encased in a wooden frame. [1] A slate pencil was used to write on the slate board. It was made from a softer and lighter coloured stone such as shale or chalk. Usually, a piece of cloth or slate sponge was used to clean it and this was sometimes ...

  7. Add, delete, or rename a Notebook in AOL Mail - AOL Help

    help.aol.com/articles/add-delete-or-rename-a...

    1. From AOL Mail, click the Notepad icon 2. In the left column, click in the New Notebook text. 3. Enter the new Notebook's name. 4. Hit Enter on your keyboard.

  8. Whiteboard - Wikipedia

    en.wikipedia.org/wiki/Whiteboard

    Whiteboard. A whiteboard (also known by the terms marker board, dry-erase board, dry-wipe board, and pen-board) is a glossy, usually white surface for making non-permanent markings. Whiteboards are analogous to blackboards, but with a smoother surface allowing for rapid marking and erasing of markings on their surface.

  9. Blackboard bold - Wikipedia

    en.wikipedia.org/wiki/Blackboard_bold

    Blackboard bold is a style of writing bold symbols on a blackboard by doubling certain strokes, commonly used in mathematical lectures, and the derived style of typeface used in printed mathematical texts. The style is most commonly used to represent the number sets ( natural numbers ), ( integers ), ( rational numbers ), ( real numbers ), and ...

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