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A pen (Latin: penna, feather) is a writing instrument used to apply ink to a surface, such as paper, for writing or drawing. Historically, reed pens, quill pens and dip pens were used, with a nib dipped in ink. Ruling pens allow precise adjustment of line width, and still find a few specialized uses, but technical pens such as the Rapidograph are more commonly used. Modern types also include ballpoint, rollerball, fountain and felt or ceramic tip pens.
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