Augmented in what way? Additional power? Additional pins? Included LEDs? Included Relays/FETs?
Oh, I'm not the only one thinking that it's the lamest mis-naming
Apparently the term "microcontroller board" wasn't posh enough for the "inventer", who ought to be shot... And then drawn & quartered - or was it the other way around
Probably a leftover from back when you used a microprocessor with the needed support circuitry like ROM, RAM, UART, PIO/PIA etc, which are all aboard the microcontroller.
I do find it hard to believe that Google wouldn't spit out at least a few links for the OP though, as
"diy microcontroller board" gives close to half a million hits and the incorrect "diy augmented microcontroller" still gives 87,900 hits, so perhaps he haven't been "all over google", but missed at least a single page - the front page unfortunately