All matter such as solids, liquids, and gases, is composed of atoms. Therefore, the atom is considered to be the basic building block of matter. However, atoms are almost always grouped together with other atoms to form what is called a molecule. Only a few gases such as helium are composed of individual atoms as the structural unit. Atoms are extremely small.
What is the Difference between USB Type A and USB Type B Plug/Connector? In the Catalog for USB-232/485 Series Interfaces, it says that the 1-port interface has a USB Type A plug whereas the 2- and 4-port interfaces have a USB Type B connector. What is the difference?
USB Type B connectors, officially referred to as Standard-B connectors, are square in shape with either a slight rounding or large square protrusion on the top, depending on the USB version. USB Type-B connectors are supported in every USB version, including USB 3.0, USB 2.0, and USB 1.1.A second type of B connector, called Powered-B, also exists but only in USB 3.0. USB 3.0 Type B connectors are often the color blue while USB 2.0 Type B and USB 1.1 Type B connectors are often black.However, this is not always the case.SB Type B Compatibility. The USB Type B connectors in USB 2.0 and USB 1.1 are identical, meaning that the USB Type B plug from one USB version will fit into the USB Type B receptacle from its own, and from the other, USB version.