The robot did not respond at first, but kept cruising between two high points, surveying for any sign of a crossing.

"The road does not go far," responded the robot.

This robot can respond to voice commands and has a mouth that moves when it speaks.

It is thought that in future a robot like this could help people with autism, for example, interpret and respond to facial expression.

The robot responds with the name of the subscriber.

"Only robots, probably," I responded, "and we know what they're worth."

There was a brief pause before the robot responded.

The robot will then interpret the information and respond accordingly.

The robot responds with "Going to get coffee from the kitchen!"

A robot must respond to humans as appropriate for their roles.