Hot Toner - is the leading online supplier of Premium Inkjet Cartridges, Toner Cartridges and Other Consumables for Printers, Photocopiers and Facsimile Machine
The number on an ink cartridge allows you to identify if an ink cartridge is compatible with the printer you are trying to use them in... know more about it...
During the time of daisy wheel or ribbon printers, this would've hampered with your work. It is important to look at the evolution of ink cartridges... read here....