Are the back Olympic medal engraved with with the event, results, and/or other information?

Question

I was watching the medal ceremony for the 4x200 Freestyle and couldn't help wondering how Michael Phelps would know which medal was for which event.

Answer 1

Nope, I have no idea how he's able to keep track of which medal was won for what event. The medals are gold, silver and bronze on the front and have jade on the back (symbolizing nobility and honor)  with the beijing olympics emblem on the back.