RCX

RCX may refer to:

• Remote code execution, when malware can run its own code on a compromised system
• RCX register, a 64-bit processor register of x86 CPUs
• Rally Championship Xtreme
• Retrocommissioning (RCx), see Template:Slink
• A Lego Mindstorms controller device
• The circumflex branch of left the coronary artery