In computing, a '''printer''' is a peripheral device which makes the specified permanent marks on paper or other materials. These are most commonly used in conjunction with a desktop or laptop [[computer]], but can in some cases be used with other external devices such as mobile phones or tablet computers. In some cases, printers are built directly into the device | In computing, a '''printer''' is a peripheral device which makes the specified permanent marks on paper or other materials. These are most commonly used in conjunction with a desktop or laptop [[computer]], but can in some cases be used with other external devices such as mobile phones or tablet computers. In some cases, printers are built directly into the device |