Science Fair Project Encyclopedia
A marker pen, or marker, is a kind of writing instrument similar to a pen but never having an external ink-source; the tip is typically made of felt and when this is true it can also be called a felt-tipped pen. Magic Marker is a trademarked name for a popular brand of marker, as is Texta, a common name for such a pen (after the brand, akin to Kleenex).
While usually intended for permanent marking, markers can be non-permanent when intended for use on overhead projectors, whiteboards, or sometimes when intended for use by children for ease of cleaning by adults.
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