➀ The article presents a Windows-based program created with Microsoft Visual Basic (VB6) for controlling devices through a PC's USB port. The program interfaces with a microprocessor-based hardware module to control up to eight appliances. ➁ The core of the system is the ATmega328P microcontroller, which is cost-effective and widely available. The circuit can be assembled on a breadboard or PCB, and the program involves using Visual Basic for communication and Arduino IDE for programming the microcontroller. ➂ The article provides detailed instructions on assembling the circuit, programming the microcontroller, and setting up the Visual Basic GUI for controlling appliances.