Paragraph 1 – A pen is a writing implement 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 Rapido graph are more commonly used. Modern times also include ballpoint, roller ball, fountain, and left or ceramic tip pens. […]