Mis forMill
Mills are places or devices where some kind of raw material is turned into something more useful. There are many different kinds of mills. Older mills usually consist of a large, heavy millstone which is turned either by the power of flowing water or by the wind, hence the commonly seen windmills.
Mills might be used to grind grain into flour, press olives into oil, process cotton into cloth, or even for processing lumber in a sawmill.