A Twip?

I was configuring the measurement system in Autodesk Design Review and noticed a unit which was new to me. It was close to Point, the printing unit, so that was a clue but I’d never encountered a Twip before today!  

Twip - Wikipedia, the free encyclopedia
A twip (derived from TWentieth of an Inch Point) is a typographical measurement, defined as 1/20 of a typographical point.