A dot matrix printer or impact matrix printer is a type of printer with a print head that prints by impact, striking an ink-soaked cloth ribbon against the paper, much like a typewriter. Unlike a typewriter, letters are drawn out of a dot matrix, consisting of needles, and thus varied fonts and arbitrary graphics can be produced. Because the printing is done by applying mechanical pressure, these printers can create carbon copies.
Laser printers are devices that print high quality text or illustrations fast. They do so by very accurately applying toner (a kind of ink powder) to the paper and then heating the paper so the toner will melt and stick to the paper.
A multifunctional is really an all-in-one device; it is both a scanner and a printer, and often even has a fax function. So effectively it's a copier, but one that has the scanning and printing functions available separately. All this is a great advantage when you have limited office space. Moreover, you will be able to work faster and more efficiently by using the device's convenient special functions.
Photo printers allow you to print digital photos, often they can even print directly from a digital camera, so you do not even need a computer to print your photos. Having such a printer at home, you can forget the photolabs!