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.
But now Type-C is here to save the day. USB Type-C is a description of the port connection itself. Itâs small, compact, and replaces the standard USB Type-A and B connections as well as the myriad of micro and mini USB ports. Basically, itâs one USB connection type to rule them all.