Credit Card Numbers - Visa. These Credit card numbers validate for Visa credit cards. The number and information is as real as it can be, and contains valid bin information. The structure of the credit card number starts with a valid bin number and also validates against the LUHN's formula.
UART is a protocol (Universal asynchronous receiver/transmitter ) for serial transfer of information. You ask about an embedded system with mentioning which so I'll assume that you have a block diagram with one indicating UART.
A UAV is an airplane that does not have a pilot to operate it but uses software instruction to perform necessary tasks. The basic function of a drone is industrial data collection as well as military data collection. Drones are used for aerial surveys, pipeline inspection, etc.