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.
What is microSD? Smaller than miniSD cards, and also based on the SD card format, microSD memory cards measure roughly 15mm x 11mm in size-about the size of a little finger fingernail.This makes them ideal for use in mobile phones.maller than miniSD cards, and also based on the SD card format, microSD memory cards measure roughly 15mm x 11mm in size-about the size of a little finger fingernail. This makes them ideal for use in mobile phones.