ICSP stands for In Circuit Serial Programming ... This is a good comparison to an Arduino shield as it allows you to quickly add functionality of your Arduino with not much thought.

"The Esplora is 100% Arduino software compatible but doesn’t provide Arduino Shield connectors (i.e. it ... a micro USB connection, an ICSP header, and a reset button. It contains everything ...

In conjunction with Arduino, Telefónica is presenting a new version of the Arduino GSM/GPRS Shield project at the Campus Party in Berlin. The project added a GPRS/GSM connection to a free ...

If you want an introduction to SDR, Elektor now has an inexpensive RF shield for the Arduino. The Si5351-based board uses that oscillator IC to shift RF signals down to audio frequencies and then ...

Sure, you can add tons of functionality via strap-on boards called “shields”.. but those can get expensive quick. Want your Arduino project to be able to play sounds? That’ll be $20.