Multi-output supplies are linear or switching supplies that provide 2 or more voltages from one case. Common parts and smaller size provide product savings. Linear types generally do not have a minimum load, or require loading on the main output to operate properly, whereas switching supplies may require a minimum loading on the main output in order for the others to function. Example: Switching supply with a +5V@10A and a +12V@ 3A; The +5V would require a minimum of 1-2A load for the +12V to operate. Multi output supplies may be symmetrical such as + & - 12V or 15V while others feature a main output such as a 5V or 3.3V along with a + & -12V or 15V sometimes 24V or more.