interchangeable train cartridge introduced with the 1403-N1 and also used with the IBM 3203. This means instead of using a chain of linked characters, the printer uses a train of unlinked characters. The cartridge allows the operator to change the font and/or character set arrangement being used by the printer. It is also possible to create a custom train with unique characters. Note that while the IBM 1403 Models 2 and 7 do offer a feature known as the Interchangeable Train Cartridge Adapter, which allows the operator to easily remove and insert a chain cartridge with a different font or character set arrangement, this feature does not have a separate machine type. Gallery Notes References External links 1403 1403 Line printers Computer-related introductions in 1959