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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 Blackboards were originally made of smooth, thin sheets of black or dark grey slate stone.
Wet wipe markers were often used on overhead projector transparencies, as they could be stored and transported easily, unlike a traditional chalkboard. With the rise of computerized slide-shows (e.g. PowerPoint) in the classroom and office, overhead usage has reduced substantially, and with it, the wet wipe marker. Marks can then be cleaned off ...
A permanent marker can also be removed by drawing over it with a dry erase marker on non-porous surfaces such as a whiteboard, [3] as dry erase markers also contain a non-polar solvent. Most dry-erase board cleaner solutions also contain effective organic solvents like 2-butoxyethanol to remove the pigment.
A whiteboard (also known by 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.
The Staples Sno-Bot was an advertising character that appeared in the United States, in television and print advertising during the Christmas seasons from 1995 until 2001. The Sno-Bot was a robot shaped like a snowman who refuses to let go of the inkjet printer he has fallen in love with. After the printer is wrestled from his grasp, the robot ...
A man has been arrested on suspicion of murder after the death of a 70-year-old woman in north Devon, police have said. Police and paramedics were called at about 13:15 GMT to Lark Rise in Newton ...
A pen is a handheld device used to apply ink to a surface, usually paper, for writing or drawing. [1] Additional types of specialized pens are used in specific types of applications and environments such as in artwork, electronics, digital scanning and spaceflight, and computing.
From January 2009 to December 2012, if you bought shares in companies when Donald M. James joined the board, and sold them when he left, you would have a 13.9 percent return on your investment, compared to a 53.1 percent return from the S&P 500.
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