Tube Time on Twitter: "this is a somewhat obscure computer input device called a "light pen." im going to try and get it working. (thread) https://t.co/DIyGFk3mqm" / Twitter
Light pen - C64-Wiki
Light pen - Free computer icons
Light Pen & Trackball : popular computer input device
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Stylus Light Pen – The SuperMatic Line – Pencoa of LI
infray Pen Flashlight Black Light, Zoomable, Small 395nm Blacklight Detector for Dog Urine & Dry Stain. IPX5 Water-Resistant, Powered by 2AAA Batteries - - Amazon.com
Input Devices Light Pen, Track Ball - YouTube
Amazon.com : Glovion Led Light Pen,Penlight for Nighttime Writing White- Pack of 3 Pens : Office Products