Related Clues:

• Sci-fi robot
• Science fair creation, briefly
• R2-D2, for one
• Automaton, briefly
• Sci-fi sidekick, maybe
• WALL-E, e.g.
• Automated task performer
• Intelligent bot
• Cyborg, casually
• Artoo, for one
• Autonomous computer program
• Hi-tech battler
• Creation that's almost human
• Kind of fly
• Spam source