3. 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.
4. That is some rather excellent work, film-makers.
Also, because we can’t have nice things, there is a guy who burned it into his own finger with a laser. :(