Dip pen - Wikipedia
Parker Pen Company - Wikipedia
Tech Questions You May Have About Apple Pencil Answered, by Qinglan Li, Computer Systems MFACA
Graphics tablet - Wikipedia
Light pen - MSX Wiki
Digital pen - Wikipedia
EMR Stylus (Electro-magnetic Resonance): How Wacom Pens work
Raw Stylus - Alchetron, The Free Social Encyclopedia
Quill - Wikipedia