A programmable robotics brick released by the LEGO company in late July 2006 and uses Technic connectors. This was preceded by the original RCX brick, and succeeded by the EV3 brick.
LEGO Mindstorms NXT is a programmable robotics kit released by LEGO in late July 2006. It replaced the first-generation Lego Mindstorms rcx (Robotics Invention System), and was replaced by the third-generation ev3 in Fall 2013.
The base kit ships in two versions: the Retail Version (sets #8527 and #8547) and the Education Base Set (set #9797).
It comes with the NXT-G programming software, but a variety of unofficial languages exist, such as NXC, NBC, leJOS NXJ, and RobotC. A new version of the set, the Lego Mindstorms NXT 2.0, was released on August 1, 2009, featuring a color sensor and other upgraded capabilities.
See the following question for details of the differences between NXT and its precursor RCX.
