"RAMPS is mainly designed for the purpose of using pololu stepper driven board (similar to 4988 driven board). Ramps can only work when connected to its mother board Mega 2560 and 4988/DRV8825.
RAMPS - RepRap Arduino Mega Pololu Shield, or RAMPS for short. It is designed to fit the entire electronics needed for a RepRap in one small package for low cost.
RAMPS interfaces an Arduino MEGA with the powerful Arduino MEGA platform and has plenty room for expansion.
The modular design includes plug in stepper drivers and extruder control electronics on an Arduino MEGA shield for easy service, part replacement, upgrade-ability and expansion.
Owning to its stability in operation and great compatibility with most 3Dprinter (all reprap-model such as Pursa i2 and i3). The combination of Ramps1.4 + MEGA2560 + A4988/DRV8825 is becoming a mainstream of DIY 3D printer control board."