How many different kinds of printers are there in the world? Does anyone know? I do not think it is possible that someone could find out, but with all the different kinds, it is hard to find the right cartridge. There is good news, though. A Cartridge Finder site does exist. This site helps you find the right cartridge at a great price. With Cartridge Finder , finding a fax or printer cartridge is not hard at all.