Service mark symbol. The service mark symbol (â ), the letters SM in superscript style) is a symbol used in the United States to provide notice that the preceding mark is a service mark.
Size matters: The micro and mini USB connectors are of similar width. But the micro connector is much thinner (smaller vertical dimension). Some product designs were not able to accommodate the height of the mini receptacle and the new thinner receptacle will encourage and allow thinner products.
ITX vs ATX. Both mini-ITX and micro-ATX are small form factor motherboards that are used in small computers. As a motherboard, both ATX and ITX provide the basic features that can run a computer. Small form factor motherboards is the common term for any motherboard below a certain size.