The Epson DFX-9000 is a heavy-duty 9-pin dot matrix printer built for high-volume, continuous-form printing such as multi-part invoices, delivery notes and other business forms that need carbon-copy-style duplication — something inkjet or laser printers can't replicate. Its wide 136-column carriage supports large-format continuous stationery, and it connects via parallel, USB and serial interfaces to fit into older or specialised business systems still reliant on impact printing. This class of printer is chosen specifically for its ability to print through multi-part forms and its very low per-page running cost over huge volumes, and is common in warehousing, logistics and accounting departments rather than general offices.