Tactical pens: Who knew? This sweet-looking, $23 ball-pen can be used to sign checks and faxes, and craft long letters, just like any other pen. But once the cap is screwed back on, you can flip ...

This isn’t the first light pen we’ve seen, they can even be connected to modern computers, too. Posted in Retrocomputing Tagged Light Pen, vector display, vectrex. Post navigation.