An Inkjet printer is a printer that is used in inkjet printing. It is mainly used connected to a computer but it can also be used standalone to print directly from cameras (PictBridge).
Inkjet printers use cartridges for the ink, lower end printers usually have two (colour and black), while more expensive photo printers will have four (CMYK), five or even six cartridges. Inkjet printers are also available in various sizes the most popular being A4 but is also sold in smaller configurations (usually for photo printing) as well as larger (usually A3).
Inkjet printers are usually used for small print runs as it is uneconomical, with inkjet ink being one of the most expensive liquids in the world. This cost can be lessened by refilling the ink cartridge or by using third part compatible or generic cartridges. Recently some companies have started selling inkjet printers with bulk ink or continuous supply systems.