I forgot to identify some of the other people.
The man following the prince is Daniel V. McMaster, long-time president of the museum.
http://articles.chicagotribune.com/2...museum-exhibit
In the picture with the Queen, left to right:
Lenox Lohr, Director of the museum; an NBC executive who probably had a lot to do with the RCA exhibit's existence.
[the Queen]
Governor Stratton of Illinois;
[two on right unknown to me]