Roneo is a brand of office equipment used to REPRODUCE documents. It was first introduced in the early 1900s and is still used today. The term Roneo is derived from the name of its inventor, Henry Roneo, who developed the first machine for reproducing documents. The machine works by using a master copy of a document which is then copied onto a stencil. This stencil is then placed onto a drum and the document is reproduced onto paper. Roneo machines are still used in many offices today, although they have been replaced by more modern methods of document reproduction.