Pronounced u-art, and short for universal asynchronous receiver-transmitter, the UART is a computer component that handles asynchronous serial communication. Every computer contains a UART to manage the serial ports, and some internal modems have their own UART.
1 Color. 2  Color of a rock depends on the minerals present and on their grain size. 3  Generally, rocks that contain lots of feldspar and quartz are light colored, and rocks that contain lots of pyroxenes, olivines, and amphiboles (ferromagnesium minerals) are dark colored.
1 Feldspars: 2  are framework silicates. 3  are the most abundant minerals as a group. 4  are the main repositories for aluminum, sodium, potassium, and calcium in igneous rocks. 5  all of the above. ____________________ 6  are examples of sheet silicates: 7  micas and clay minerals. 8  pyroxenes and amphiboles. 9  olivine and feldspar.