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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 Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.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. 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 (complex ...

4. Chalkboard art - Wikipedia

   en.wikipedia.org/wiki/Chalkboard_art

   Chalkboard art. Children's drawing on a chalkboard. Chalkboard art or chalk art is the use of chalk on a blackboard as a visual art. [1] It is similar to art using pastels and related to sidewalk art that often uses chalk. Chalkboard art is often used in restaurants, shops or walls. [2]

5. Should You Be Worried If You've Been Eating Chalk? - Healthline

   www.healthline.com/health/eating-chalk

   Eating chalk often can disrupt your digestive system and cause damage to your internal organs. risks of eating chalk. Complications of eating chalk consistently may include: tooth damage or ...

6. Blackboard system - Wikipedia

   en.wikipedia.org/wiki/Blackboard_system

   A blackboard system is the central space in a multi-agent system. It's used for describing the world as a communication platform for agents. To realize a blackboard in a computer program, a machine readable notation is needed in which facts can be stored. One attempt in doing so is a SQL database, another option is the Learnable Task Modeling ...

7. Wikipedia:Typography - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Typography

   Below are some personal writings on web typography, and its potential use on Wikipedia. It focuses on fonts that are installed by default, as these provide a stable installed base. It also focuses heavily on Windows. Information relating to other platforms is very welcome.