LEGO Mindstorms reflections – What happened before the announcement in January 1998 - News - LEGO Ambassador Network
LEGO 884b Yellow Mindstorms RCX 1.0 without Power Jack (from Mindstorms 1.5 sets) - Complete Brick | electricBricks : LEGO set and parts shop and database
Robótica – RCX el cerebro de la bestia | Felix Maocho