The term 'cartridge filler' refers to a job that involves filling cartridges with INK, TONER, and AMMO. INK is a liquid or paste that contains pigments or dyes and is used to color a surface to produce an image, text, or design. TONER is a powder mixture used in laser printers and photocopiers to form the printed text and images on the paper. AMMO is short for ammunition, which is a material fired, scattered, dropped, or detonated from a weapon to cause damage or destruction.