Ridley Scott's 2012 film Prometheus was intended as a prequel to his earlier work on the Alien franchise, and as a result contained many clever details and call-aheads.
As David examines the black nanoids on his finger, there is a tiny logo as part of his fingerprint.
It's the logo of the Weyland Corporation, the creators of David, and predecessors to the Weyland-Yutani corporation of the Alien franchise!
It's a tiny, throwaway detail, but a fascinating demonstration of just how much thought went into the film, despite some other issues.
That is some rather excellent work, film-makers.