Hello: rather than have all your questions entered separately (knocking other questions off the page) they've al been placed here:
What does 7 W of the W mean?
Quizmonster says: Wonders of the world.
What does '66 B of the B mean?
Books of the Bible
What does 90 D in a RA mean?
Jansy says 90 Degrees in a Right Angle
What does 5 T on a F mean?
mindbullets says 5 tines on a fork? just guessing
P.Greenwood and Jansy say Five toes on a foot
What does '13 S in the USF' mean?
KEJ2000 says 13 stripes in the United States flag
What does 3 B M (S H T R) mean?
katiesara says 3 Blind Mice (See How They Run)