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.
From left to right: micro USB, mini USB, type B standard USB, and type A standard USB (both female and male). The USB connection is quite possibly the most pervasive connection type in todayâs world. Nearly every form of computer peripheral device â keyboards, mice, headsets, flash drives, wireless adapters, etc.