A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | Y | Z
UART Universal asynchronous receiver/transmitter. An interface device for serial/parallel conversion, buffering, and adding check bits.
UJT Unijunction transistor.
UL Underwriters Laboratories (an approval agency).
USART Universal synchronous/asynchronous receiver/transmitter. A UART with the added capability for synchronous data communication.