For questions related to the RAMPS controller board - The RepRap Arduino Mega Pololu Shield, or RAMPS for short, is an expansion shield for the Arduino Mega designed to fit the entire electronics for a RepRap 3D printer in a small, low cost package.

RAMPS 1.x is a family of popular 3D Printer controllers, which is a shield that sits on top of an Arduino Mega. The most commonly used is the 1.4 version.

The RepRap Arduino Mega Pololu Shield, or RAMPS for short, is an expansion shield for the Arduino Mega designed to fit the entire electronics for a RepRap 3D printer in a small, low cost package.

Additional information and a full list of features can be found at the RAMPS RepRap Wiki page.

See these definitions from the RepRapWiki:

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