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A combination between a whiteboard and a cork bulletin board Original early 1960s ad for "Plasti-slate", the first whiteboard/dry erase board invented by Martin Heit. It has been widely reported that Korean War veteran and photographer Martin Heit and Albert Stallion, an employee at Alliance, a leading flat rolled steel sheet supplier should be credited with the invention of the whiteboard in ...
Dry erase markers can usually be applied on top of the wet wipe marker, and erased without touching the wet wipe marks. Wet wipe markers were often used on overhead projector transparencies, as they could be stored and transported easily, unlike a traditional chalkboard.
The Magic Slate consists of a piece of rigid cardboard the size of a small clipboard that is covered with dark waxed paper on one side, a sheet of translucent plastic film that covers the waxed paper and is affixed to the top of the board, and a blunt stylus made of wood or plastic.
In computing, magnetic-core memory is a form of random-access memory. It predominated for roughly 20 years between 1955 and 1975, and is often just called core memory , or, informally, core . Core memory uses toroids (rings) of a hard magnetic material (usually a semi-hard ferrite ).
Modern wallpaper is made in long rolls which are hung vertically on a wall. Patterned wallpapers are designed so that the pattern "repeats", and thus pieces cut from the same roll can be hung next to each other so as to continue the pattern without it being easy to see where the join between two pieces occurs.
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