To specify a target for assassination or kidnapping, Orlak (or a henchman) inserts a specially designed card into a slot built into the robot’s chest, right at its heart. One of those cards is below.

The layout of the card puts the victim’s picture on the left; a node-graph diagram that looks like a constellation diagram, and some inscrutable symbols on the right. The characters discuss that this card contains a cardiogram of the victim, but it’s unclear which part of the card has this information, because they usually look something like this:

Oh, it’s probably worth mentioning that one of the movie’s givens is that a cardiogram can uniquely identify a person, like a thumbprint (which isn’t as provably unique as popular culture would have us believe). But to use a cardiogram to locate a person without a ubiquitous sensing network (unthinkable in 1969) would require a very high resolution cardiogram, a wall-piercing sensors, and some shockingly advanced pattern matching on the part of the robot, and I’m not sure I’m willing to give this film that much credit.

Presuming that there are lots of technical reasons for the stuff on the right, and the robot needs the profile for visual recognition, I imagine the only thing missing is a human-readable name so these are easy for the henchmen and scientists to discuss amongst themselves. I mean, they might happen to know every single scientist in town by sight, but having the name would avoid possible misidentifications. The design of artifacts have to take into account all common scenarios of use, including production, maintenance, and storage.

Speaking of which, it’s unclear how these cards are produced. They seem like they take a lot of expert effort to produce and fabricate. Let’s give the film credit to say that this is a deliberate attempt by the enslaved scientists to…

• Make something as irrevocable as a death sentence very difficult to order.
• Ensure an order to the murderous robot takes time, and thereby give time to let passions subside and orders to be rescinded.
• Serve as a bailiwick of sorts, being too difficult for a layperson to do, and thereby difficult to turn on its masters.
• Secure their jobs.

LATE BREAKING UPDATE: Turns out these cards are a copy of cards from The Avengers (1961–1969). Check out the comparison.