This table compares past and present versions of LEGO Robotics Software.
ROBOLAB 2.5.4 - The previous version
of ROBOLAB (only for the RCX), designed for the educational market.
RIS 2.0 (Robotics Invention System) - Retail software
for the RCX.
MINDSTORMS NXT (Lego MINDSTORMS NXT Software) - A special
version of the NXT software for the educational market.
Retail NXT - The retail version of the NXT Software.
ROBOLAB 2.9 - The latest version of ROBOLAB (for the
NXT and RCX),
designed to help facilitate migration from the RCX to the NXT.