What is millers?

The term "millers" is ambiguous as it can refer to several distinct technologies or professions. It most commonly refers to people who operate mills, typically grain mills, to grind grains into flour. The technology involved in this case includes the mill itself, which can be powered by various sources such as water, wind, or electricity, and the techniques for operating it to efficiently produce flour. It could also refer to specialized milling machines used in manufacturing to shape materials. Without further context, it's difficult to provide a more specific explanation.