A brief guide to the world of printer ink cartridges:
OEM: A brand new cartridge that has been made by the same brand (or OEM – Original Equipment Manufacturer) that made your printer. Most new printers will come with OEM cartridges.
Compatible: A compatible cartridge is also brand new but has been made by a third-party manufacturer.
Remanufactured: Original cartridges that have been used once, returned, cleaned, refurbished and then refilled. The term usually applies to toner cartridges used in laser printers.
Refilled: Original cartridges that have been used once, returned, cleaned and refilled. The term usually applies to ink cartridges used in inkjet printers.