Arduino Uno R3

Discontinued.

Arduino UNO R3 and R4 Minima

Arduino UNO R4 Minima Development Board - DFRobot

Arduino UNO CH340G (Clone to Arduino UNO R3)

UNO R3 Board ATmega328P ATMEGA16U2 Development Board Compatible With Arduino - Rexqualis Industries,Ingenious & fun DIY electronics and kits

UNO R3 + WIFI ESP8266 + CH340G Arduino and WIFI - a Versatile Development Board : 6 Steps - Instructables

Arduino Uno R3 Microcontroller

Arduino Uno R3 Development Board - Control Voltage

Arduino UNO Rev3; 16MHz Clock Rate; 32KB Flash Memory; 1KB EEPROM; ATmega328P Microcontroller - Micro Center

TZT Arduino Official UNO R3 Development Board ATmega328P

Arduino Uno R3 Microcontroller Board - Unboxing & Basic Testing w/IDE & mBlock