25 years ago Parallax introduced the BASIC Stamp, for quite some time it was the DIY and lab tool for simple microprocessor control. That design was never updated.
This board keeps that 5V tolerant 24 pin Stamp form factor and replaces the RS-232 debug connection with USB.
In addition to our BASIC or C tools, this board has a 10 pin SerialWire debug header that is compatible with Keil, IAR, and Eclipse based tools like MCUxpresso (sold by other vendors). If you need one of those Serial/Wire debuggers, you can get one here.